Remove leftover cancelledUserAnimationTypes

This was originally introduced in [1] to track disabling user
animations on insets with null or empty visible frames. This was later
reverted in [2], with this array left over but essentially unused.

 [1]: Id70f59be7653beedc02d6c8bc3b1bd50a357f4fe
 [2]: I3210df9bcc087f5fba712e0e7ac4922475c3b88d

Flag: EXEMPT cleanup
Bug: 281029564
Test: n/a
Change-Id: I5da7282b2a8b29b58796210793267c2abac441af