Revert "Add logging when art-method is found to be null during class-unloading"

This reverts commit cc71b0afb121d2258094e3dc909e8dd6b3eb7a52.

Reason for revert: Logging is no longer required.
Bug: 298575095

Change-Id: Ib78adce5533ed0d86b76f122acb6a6ce28d9b534
2 files changed