Revert "Disable config_disallowRemovingLastAdminUser" Revert submission 33405966-disallow-removing-last-full-admin Reason for revert: This CL overrides the wrong place. Correct override in ag/33940968 Reverted changes: /q/submissionid:33405966-disallow-removing-last-full-admin Change-Id: I2075e2348aa206e01cf3c021e7c7a0a1c6a004c5