Remove prepare_for_animation

manimlib/animation/animation.py

@@ -43,7 +43,6 @@ class Animation(object):
         # played.  As much initialization as possible,
         # especially any mobject copying, should live in
         # this method
-        self.mobject.prepare_for_animation()
         self.starting_mobject = self.create_starting_mobject()
         if self.suspend_mobject_updating:
             # All calls to self.mobject's internal updaters

manimlib/mobject/mobject.py

@@ -1176,9 +1176,6 @@ class Mobject(object):
             sm1.interpolate_color(sm1, sm2, 1)
         return self
 
-    def prepare_for_animation(self):
-        pass
-
     def cleanup_from_animation(self):
         pass