Revert "Add warning message if developer depends on undocumented behavior"

This reverts commit 596db6aa.

Reason for revert: Likely culprit for b/385270677  - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I77a797a4204fff70d471171506360175d6d38b54