Deprecate get_grid_positions(..., raw=True).

The API was added in f8dfea7 but never actually used anywhere.

Author: anntzer

doc/api/next_api_changes/deprecations/23572-AL.rst

@@ -0,0 +1,3 @@
+``GridSpecBase.get_grid_positions(..., raw=True)``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+... is deprecated.

lib/matplotlib/gridspec.py

@@ -142,6 +142,7 @@ def get_height_ratios(self):
         """
         return self._row_height_ratios
 
+    @_api.delete_parameter("3.7", "raw")
     def get_grid_positions(self, fig, raw=False):
         """
         Return the positions of the grid cells in figure coordinates.