Revert "Add some comments to test Automerger"

This reverts commit c85c1694f5007ad04e7216661b6fc3f388d62bd5.

Reason for revert: This commit is only an experiment targeted on Automerger. Since the test is done, there is no need to keep this CL.

Change-Id: I7eaa7829426a9d3419cf184b33e3f09ef2c00a95