Index: src/applications/diffusion/engine/DiffusionCommitHookEngine.php
===================================================================
--- src/applications/diffusion/engine/DiffusionCommitHookEngine.php
+++ src/applications/diffusion/engine/DiffusionCommitHookEngine.php
@@ -432,8 +432,6 @@
         return $this->findMercurialChangegroupRefUpdates();
       case 'prepushkey':
         return $this->findMercurialPushKeyRefUpdates();
-      case 'pretag':
-        return $this->findMercurialPreTagRefUpdates();
       default:
         throw new Exception(pht('Unrecognized hook "%s"!', $hook));
     }
@@ -693,10 +691,6 @@
     return array($ref_update);
   }
 
-  private function findMercurialPreTagRefUpdates() {
-    return array();
-  }
-
   private function findMercurialContentUpdates(array $ref_updates) {
     // TODO: Implement.
     return array();
Index: src/applications/repository/engine/PhabricatorRepositoryPullEngine.php
===================================================================
--- src/applications/repository/engine/PhabricatorRepositoryPullEngine.php
+++ src/applications/repository/engine/PhabricatorRepositoryPullEngine.php
@@ -412,12 +412,6 @@
       $repository->getCallsign(),
       'prepushkey');
 
-    // This one handles creating tags.
-    $data[] = csprintf(
-      'pretag.phabricator = %s %s %s',
-      $bin,
-      $repository->getCallsign(),
-      'pretag');
     $data[] = null;
 
     $data = implode("\n", $data);