Remove pokemon_go from ANGLE Allowlist

Pokemon_go grass is not rendering correctly: b/406827038.
While we have a fix in ANGLE, the fix is not likely approved
to get in release branch without a guarded flag.
Remove the game from allowlist.

Flag: TEST_ONLY
Test: atest AngleAllowlistTraceTest
Bug: b/370845648
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9c5bfb9f5cc2e1e9ca4f2d6ae8b5eb8c6349b7b4)
Merged-In: I682b5095d70baf3660b1f0459ce491ad942500d5
Change-Id: I682b5095d70baf3660b1f0459ce491ad942500d5