Remove pointless requireCapabilities() method from PhabricatorProjectColumnTransactionEditor

Summary:
Depends on D19581. Ref T13164. This method has no effect:

  - You must always have CAN_EDIT to reach an Editor in the first place.
  - Per previous change, I'm going to restructure this so transactions explicitly check CAN_EDIT by default anyway.

Test Plan: Tried to edit and hide a project column as a user without permission, hit global permission checks long before reaching this method.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13164

Differential Revision: https://secure.phabricator.com/D19582

src/applications/project/editor/PhabricatorProjectColumnTransactionEditor.php

@@ -137,22 +137,4 @@ final class PhabricatorProjectColumnTransactionEditor
     return $errors;
   }
 
-
-  protected function requireCapabilities(
-    PhabricatorLiskDAO $object,
-    PhabricatorApplicationTransaction $xaction) {
-
-    switch ($xaction->getTransactionType()) {
-      case PhabricatorProjectColumnTransaction::TYPE_NAME:
-      case PhabricatorProjectColumnTransaction::TYPE_STATUS:
-        PhabricatorPolicyFilter::requireCapability(
-          $this->requireActor(),
-          $object,
-          PhabricatorPolicyCapability::CAN_EDIT);
-        return;
-    }
-
-    return parent::requireCapabilities($object, $xaction);
-  }
-
 }