Remove PHID_TYPE_ACMT

Summary: Ref T4896. This was used by the old audit comment storage, which is now defunct.

Test Plan: Grepped for callsites in the codebase.

Reviewers: joshuaspence, btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4896

Differential Revision: https://secure.phabricator.com/D10152

src/applications/phid/PhabricatorPHIDConstants.php

@@ -6,7 +6,6 @@ final class PhabricatorPHIDConstants {
   const PHID_TYPE_UNKNOWN = '????';
   const PHID_TYPE_MAGIC   = '!!!!';
   const PHID_TYPE_STRY    = 'STRY';
-  const PHID_TYPE_ACMT    = 'ACMT';
   const PHID_TYPE_TOBJ    = 'TOBJ';
   const PHID_TYPE_ACNT    = 'ACNT';
   const PHID_TYPE_PDCT    = 'PDCT';