Remove dead code from deprecated-and-removed block

The drawtype argument was removed in an earlier PR, but this block was
not.

Author: QuLogic

lib/matplotlib/widgets.py

@@ -3344,12 +3344,6 @@ def _rect_bbox(self):
 
     def _set_aspect_ratio_correction(self):
         aspect_ratio = self.ax._get_aspect_ratio()
-        if not hasattr(self._selection_artist, '_aspect_ratio_correction'):
-            # Aspect ratio correction is not supported with deprecated
-            # drawtype='line'. Remove this block in matplotlib 3.7
-            self._aspect_ratio_correction = 1
-            return
-
         self._selection_artist._aspect_ratio_correction = aspect_ratio
         if self._use_data_coordinates:
             self._aspect_ratio_correction = 1