Remove execute_constrained_layout

Author: oscargus

lib/matplotlib/figure.py

@@ -3474,21 +3474,6 @@ def handler(ev):
 
         return None if event is None else event.name == "key_press_event"
 
-    @_api.deprecated("3.6", alternative="figure.get_layout_engine().execute()")
-    def execute_constrained_layout(self, renderer=None):
-        """
-        Use ``layoutgrid`` to determine pos positions within Axes.
-
-        See also `.set_constrained_layout_pads`.
-
-        Returns
-        -------
-        layoutgrid : private debugging object
-        """
-        if not isinstance(self.get_layout_engine(), ConstrainedLayoutEngine):
-            return None
-        return self.get_layout_engine().execute(self)
-
     def tight_layout(self, *, pad=1.08, h_pad=None, w_pad=None, rect=None):
         """
         Adjust the padding between and around subplots.