MNT: Remove align from sphinxext.plot_directive

This follows the deprecation period.

Author: greglucas

doc/api/next_api_changes/removals/23XXX-GL.rst

@@ -21,3 +21,8 @@ Extra parameters to Axes constructor
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Parameters of the Axes constructor other than *fig* and *rect* are now keyword only.
+
+``sphinext.plot_directive.align`` has been removed
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Use ``docutils.parsers.rst.directives.images.Image.align`` instead.

lib/matplotlib/sphinxext/plot_directive.py

@@ -162,9 +162,6 @@
 from matplotlib import _api, _pylab_helpers, cbook
 
 matplotlib.use("agg")
-align = _api.deprecated(
-    "3.4", alternative="docutils.parsers.rst.directives.images.Image.align")(
-        Image.align)
 
 __version__ = 2