Revert "Grant ability to delete references to v8-admins" This reverts commit 31eedffaf1d07989f11e6a914101c52bd1115f86. Reason for revert: Removing this dangerous permission (was granted temporarily to delete refs/heads/6.5-lkgr as it was incorrectly created, see https://crbug.com/805439 for more details) to make sure that no-one can delete important refs like refs/heads/master just by typing one wrong command. Original change's description: > Grant ability to delete references to v8-admins > > [email protected] > > Change-Id: Ie505522787348bdab77e61ba9c389aa70a54ee58 [email protected],[email protected] Change-Id: Ied3370f8b1d29a809596f1eeea2995aee6ddbd6e No-Presubmit: true No-Tree-Checks: true No-Try: true