Delete obsolete comment after b/210473615 am: a00dd01f0c am: d6a55fd129 am: 1f08d32241 am: 2395c8bc75 am: 820e093159

Original change: https://android-review.googlesource.com/c/platform/art/+/2193435

Change-Id: I20a0e4f936b8f90f00da8948147f71aae5563d18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>