diff --git a/doc/api/axes_api.rst b/doc/api/axes_api.rst
@@ -556,7 +556,6 @@ Drawing
    Axes.draw
    Axes.draw_artist
    Axes.redraw_in_frame
-   Axes.get_renderer_cache
 
    Axes.get_rasterization_zorder
    Axes.set_rasterization_zorder

diff --git a/doc/api/axis_api.rst b/doc/api/axis_api.rst
@@ -138,7 +138,6 @@ Rendering helpers
 
    Axis.get_minpos
    Axis.get_tick_space
-   Axis.get_ticklabel_extents
    Axis.get_tightbbox
 
 
@@ -179,7 +178,6 @@ XAxis Specific
    :nosignatures:
 
    XAxis.axis_name
-   XAxis.get_text_heights
    XAxis.get_ticks_position
    XAxis.set_ticks_position
    XAxis.set_label_position
@@ -195,7 +193,6 @@ YAxis Specific
    :nosignatures:
 
    YAxis.axis_name
-   YAxis.get_text_widths
    YAxis.get_ticks_position
    YAxis.set_offset_position
    YAxis.set_ticks_position
@@ -260,7 +257,6 @@ specify a matching series of labels.  Calling ``set_ticks`` makes a
 
    Tick.get_loc
    Tick.get_pad
-   Tick.get_pad_pixels
    Tick.get_tick_padding
    Tick.get_tickdir
    Tick.get_view_interval

diff --git a/doc/api/next_api_changes/removals/24984-OG.rst b/doc/api/next_api_changes/removals/24984-OG.rst
@@ -0,0 +1,174 @@
+Parameters to ``plt.figure()`` and the ``Figure`` constructor
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+All parameters to `.pyplot.figure` and the `.Figure` constructor, other than
+*num*, *figsize*, and *dpi*, are now keyword-only.
+
+``stem(..., use_line_collection=False)``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+... is no longer supported. This was a compatibility fallback to a
+former more inefficient representation of the stem lines.
+
+Positional / keyword arguments
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Passing all but the very few first arguments positionally in the constructors
+of Artists is no longer possible. Most arguments are now keyword-only.
+
+The *emit* and *auto* parameters of ``set_xlim``, ``set_ylim``,
+``set_zlim``, ``set_rlim`` are now keyword-only.
+
+The *transOffset* parameter of `.Collection.set_offset_transform` and the
+various ``create_collection`` methods of legend handlers has been renamed to
+*offset_transform* (consistently with the property name).
+
+``Axes.get_window_extent`` / ``Figure.get_window_extent`` accept only
+*renderer*. This aligns the API with the general `.Artist.get_window_extent`
+API. All other parameters were ignored anyway.
+
+Methods to set parameters in ``LogLocator`` and ``LogFormatter*``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+In `~.LogFormatter` and derived subclasses, the methods ``base`` and
+``label_minor`` for setting the respective parameter are removed and
+replaced by ``set_base`` and ``set_label_minor``, respectively.
+
+In `~.LogLocator`, the methods ``base`` and ``subs`` for setting the respective
+parameter are removed. Instead, use ``set_params(base=..., subs=...)``.
+
+``Axes.get_renderer_cache``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The canvas now takes care of the renderer and whether to cache it or not,
+so the ``Axes.get_renderer_cache`` method is removed. The
+alternative is to call ``axes.figure.canvas.get_renderer()``.
+
+Unused methods in ``Axis``, ``Tick``, ``XAxis``, and ``YAxis``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Tick.label`` is now removed. Use ``Tick.label1`` instead.
+
+The following methods are no longer used and removed without a replacement:
+
+- ``Axis.get_ticklabel_extents``
+- ``Tick.get_pad_pixels``
+- ``XAxis.get_text_heights``
+- ``YAxis.get_text_widths``
+
+``mlab.stride_windows``
+~~~~~~~~~~~~~~~~~~~~~~~
+
+... is removed. Use ``numpy.lib.stride_tricks.sliding_window_view`` instead.
+
+``Axes3D``
+~~~~~~~~~~
+
+The ``dist`` attribute has been privatized. Use the *zoom* keyword argument in
+`.Axes3D.set_box_aspect` instead.
+
+The ``w_xaxis``, ``w_yaxis``, and ``w_zaxis`` attributes are now removed.
+Instead use ``xaxis``, ``yaxis``, and ``zaxis``.
+
+3D Axis
+~~~~~~~
+
+``mplot3d.axis3d.Axis.set_pane_pos`` is removed. This is an internal method
+where the provided values are overwritten during drawing. Hence, it does not
+serve any purpose to be directly accessible.
+
+The two helper functions ``mplot3d.axis3d.move_from_center`` and
+``mplot3d.axis3d.tick_update_position`` are considered internal and deprecated.
+If these are required, please vendor the code from the corresponding private
+methods ``_move_from_center`` and ``_tick_update_position``.
+
+``checkdep_usetex`` removed
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This method was only intended to disable tests in case no latex install was
+found. As such, it is considered to be private and for internal use only.
+
+Please vendor the code from a previous version if you need this.
+
+``date_ticker_factory`` removed
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``date_ticker_factory`` method in the `matplotlib.dates` module is
+removed. Instead use `~.AutoDateLocator` and `~.AutoDateFormatter` for a
+more flexible and scalable locator and formatter.
+
+If you need the exact ``date_ticker_factory`` behavior, please copy the code
+from a previous version.
+
+``transforms.Affine2D.identity()``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+... is removed in favor of directly calling the `.Affine2D` constructor with
+no arguments.
+
+Removals in ``testing.decorators``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The unused class ``CleanupTestCase`` and decorator ``cleanup`` are removed.
+The function ``check_freetype_version`` is considered internal and removed.
+Vendor the code from a previous version.
+
+``text.get_rotation()``
+~~~~~~~~~~~~~~~~~~~~~~~
+
+... is removed with no replacement. Copy the previous implementation if
+needed.
+
+Miscellaneous internals
+~~~~~~~~~~~~~~~~~~~~~~~
+
+- ``axes_grid1.axes_size.AddList``; use ``sum(sizes, start=Fixed(0))`` (for
+  example) to sum multiple size objects.
+- ``axes_size.Padded``; use ``size + pad`` instead
+- ``axes_size.SizeFromFunc``, ``axes_size.GetExtentHelper``
+- ``AxisArtistHelper.delta1`` and ``AxisArtistHelper.delta2``
+- ``axislines.GridHelperBase.new_gridlines`` and
+  ``axislines.Axes.new_gridlines``
+- ``_DummyAxis.dataLim`` and ``_DummyAxis.viewLim``; use
+  ``get_data_interval()``, ``set_data_interval()``, ``get_view_interval()``,
+  and ``set_view_interval()`` instead.
+- ``ImageMagickBase.delay`` and ``ImageMagickBase.output_args``
+- ``MathtextBackend``, ``MathtextBackendAgg``, ``MathtextBackendPath``,
+  ``MathTextWarning``
+- ``TexManager.get_font_config``; it previously returned an internal hashed key
+  for used for caching purposes.
+- ``TextToPath.get_texmanager``; directly construct a `.texmanager.TexManager`
+  instead.
+- ``ticker.is_close_to_int``; use ``math.isclose(x, round(x))`` instead.
+- ``ticker.is_decade``; use ``y = numpy.log(x)/numpy.log(base);
+  numpy.isclose(y, numpy.round(y))`` instead.
+
+
+Backend-specific removals
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- ``backend_pdf.Name.hexify``
+- ``backend_pdf.Operator`` and ``backend_pdf.Op.op`` are removed in favor of
+  a single standard `enum.Enum` interface on `.backend_pdf.Op`.
+- ``backend_pdf.fill``; vendor the code of the similarly named private
+  functions if you rely on these functions.
+- ``backend_pgf.LatexManager.texcommand`` and
+  ``backend_pgf.LatexManager.latex_header``
+- ``backend_pgf.NO_ESCAPE``
+- ``backend_pgf.common_texification``
+- ``backend_pgf.get_fontspec``
+- ``backend_pgf.get_preamble``
+- ``backend_pgf.re_mathsep``
+- ``backend_pgf.writeln``
+- ``backend_ps.convert_psfrags``
+- ``backend_ps.quote_ps_string``; vendor the code of the similarly named
+  private functions if you rely on it.
+- ``backend_svg.escape_attrib``; vendor the code of the similarly named private
+  functions if you rely on it.
+- ``backend_svg.escape_cdata``; vendor the code of the similarly named private
+  functions if you rely on it.
+- ``backend_svg.escape_comment``; vendor the code of the similarly named
+  private functions if you rely on it.
+- ``backend_svg.short_float_fmt``; vendor the code of the similarly named
+  private functions if you rely on it.
+- ``backend_svg.generate_transform`` and ``backend_svg.generate_css``
diff --git a/doc/api/prev_api_changes/api_changes_3.1.0.rst b/doc/api/prev_api_changes/api_changes_3.1.0.rst
@@ -463,7 +463,7 @@ instead of ``\usepackage{ucs}\usepackage[utf8x]{inputenc}``.
 
 Exception changes
 -----------------
-- `mpl_toolkits.axes_grid1.axes_size.GetExtentHelper` now raises `ValueError`
+- ``mpl_toolkits.axes_grid1.axes_size.GetExtentHelper`` now raises `ValueError`
   for invalid directions instead of `KeyError`.
 - Previously, subprocess failures in the animation framework would raise either
   in a `RuntimeError` or a `ValueError` depending on when the error occurred.
@@ -932,9 +932,9 @@ internal datetime representation; or use ``dates.datestr2num``.
 Axes3D
 ~~~~~~
 
-- `.axes3d.Axes3D.w_xaxis`
-- `.axes3d.Axes3D.w_yaxis`
-- `.axes3d.Axes3D.w_zaxis`
+- ``.axes3d.Axes3D.w_xaxis``
+- ``.axes3d.Axes3D.w_yaxis``
+- ``.axes3d.Axes3D.w_zaxis``
 
 Use ``axes3d.Axes3D.xaxis``, ``axes3d.Axes3D.yaxis`` and
 ``axes3d.Axes3D.zaxis`` instead.

diff --git a/doc/api/prev_api_changes/api_changes_3.6.0/removals.rst b/doc/api/prev_api_changes/api_changes_3.6.0/removals.rst
@@ -94,7 +94,7 @@ The following module-level classes/variables have been removed:
   ``mathtext.latex_to_standard``
 - ``mathtext.MathtextBackendPdf``, ``mathtext.MathtextBackendPs``,
   ``mathtext.MathtextBackendSvg``, ``mathtext.MathtextBackendCairo``; use
-  `.MathtextBackendPath` instead.
+  ``.MathtextBackendPath`` instead.
 - ``mathtext.Node`` and all its subclasses
 - ``mathtext.NUM_SIZE_LEVELS``
 - ``mathtext.Parser``

diff --git a/doc/api/toolkits/mplot3d/axes3d.rst b/doc/api/toolkits/mplot3d/axes3d.rst
@@ -270,9 +270,6 @@ Aliases and deprecated methods
     tunit_cube
     tunit_edges
     unit_cube
-    w_xaxis
-    w_yaxis
-    w_zaxis
 
 
 Other

diff --git a/doc/users/prev_whats_new/dflt_style_changes.rst b/doc/users/prev_whats_new/dflt_style_changes.rst
@@ -575,7 +575,7 @@ default.  The default face color is now ``'C0'`` instead of ``'b'``.
            ax_bottom.set_ylim(0, .75)
            ax_bottom.add_artist(mpatches.Rectangle(grid[1] - [0.025, 0.05],
                                                    0.05, 0.1))
-           ax_bottom.add_artist(mpatches.RegularPolygon(grid[3], 5, 0.1))
+           ax_bottom.add_artist(mpatches.RegularPolygon(grid[3], 5, radius=0.1))
            ax_bottom.add_artist(mpatches.Ellipse(grid[4], 0.2, 0.1))
            ax_bottom.add_artist(mpatches.Circle(grid[0], 0.1))
            ax_bottom.axis('off')

diff --git a/doc/users/prev_whats_new/whats_new_1.4.rst b/doc/users/prev_whats_new/whats_new_1.4.rst
@@ -121,7 +121,7 @@ Support for strides in mlab
 Todd Jennings added some functions to mlab to make it easier to use NumPy
 strides to create memory-efficient 2D arrays.  This includes
 ``matplotlib.mlab.stride_repeat``, which repeats an array to create a 2D
-array, and :func:`~matplotlib.mlab.stride_windows`, which uses a moving window
+array, and ``matplotlib.mlab.stride_windows``, which uses a moving window
 to create a 2D array from a 1D array.
 
 Formatter for new-style formatting strings

diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -462,26 +462,6 @@ def impl(args, regex, min_ver=None, ignore_exit_code=False):
         raise ValueError(f"Unknown executable: {name!r}")
 
 
-@_api.deprecated("3.6", alternative="a vendored copy of this function")
-def checkdep_usetex(s):
-    if not s:
-        return False
-    if not shutil.which("tex"):
-        _log.warning("usetex mode requires TeX.")
-        return False
-    try:
-        _get_executable_info("dvipng")
-    except ExecutableNotFoundError:
-        _log.warning("usetex mode requires dvipng.")
-        return False
-    try:
-        _get_executable_info("gs")
-    except ExecutableNotFoundError:
-        _log.warning("usetex mode requires ghostscript.")
-        return False
-    return True
-
-
 def _get_xdg_config_dir():
     """
     Return the XDG configuration directory, according to the XDG base

diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -20,7 +20,7 @@
     pyparsing_common)
 
 import matplotlib as mpl
-from . import _api, cbook
+from . import cbook
 from ._mathtext_data import (
     latex_to_bakoma, stix_glyph_fixes, stix_virtual_fonts, tex2uni)
 from .font_manager import FontProperties, findfont, get_font
@@ -35,8 +35,7 @@
 # FONTS
 
 
-@_api.delete_parameter("3.6", "math")
-def get_unicode_index(symbol, math=False):  # Publicly exported.
+def get_unicode_index(symbol):  # Publicly exported.
     r"""
     Return the integer index (from the Unicode table) of *symbol*.
 
@@ -45,17 +44,7 @@ def get_unicode_index(symbol, math=False):  # Publicly exported.
     symbol : str
         A single (Unicode) character, a TeX command (e.g. r'\pi') or a Type1
         symbol name (e.g. 'phi').
-    math : bool, default: False
-        If True (deprecated), replace ASCII hyphen-minus by Unicode minus.
     """
-    # From UTF #25: U+2212 minus sign is the preferred
-    # representation of the unary and binary minus sign rather than
-    # the ASCII-derived U+002D hyphen-minus, because minus sign is
-    # unambiguous and because it is rendered with a more desirable
-    # length, usually longer than a hyphen.
-    # Remove this block when the 'math' parameter is deleted.
-    if math and symbol == '-':
-        return 0x2212
     try:  # This will succeed if symbol is a single Unicode char
         return ord(symbol)
     except TypeError:

diff --git a/lib/matplotlib/animation.py b/lib/matplotlib/animation.py
@@ -615,18 +615,6 @@ class ImageMagickBase:
     _exec_key = 'animation.convert_path'
     _args_key = 'animation.convert_args'
 
-    @_api.deprecated("3.6")
-    @property
-    def delay(self):
-        return 100. / self.fps
-
-    @_api.deprecated("3.6")
-    @property
-    def output_args(self):
-        extra_args = (self.extra_args if self.extra_args is not None
-                      else mpl.rcParams[self._args_key])
-        return [*extra_args, self.outfile]
-
     def _args(self):
         # ImageMagick does not recognize "raw".
         fmt = "rgba" if self.frame_format == "raw" else self.frame_format
-Original file line number
+Diff line change
@@ Expand Up / @@ -270,9 +270,6 @@ Aliases and deprecated methods @@
         tunit_cube
         tunit_edges
         unit_cube
-        w_xaxis
-        w_yaxis
-        w_zaxis
     Other
@@ Expand Down @@