Remove extra parameter in newStandardEditField() call

Summary: See D14617. This could probably go either way but we don't currently need `$engine` in `newStandardEditField()`, so just get rid of it.

Test Plan: Edited a task with standard custom fields defined.

Reviewers: vrana, chad

Reviewed By: vrana

Differential Revision: https://secure.phabricator.com/D17370

src/infrastructure/customfield/field/PhabricatorCustomField.php

@@ -1095,7 +1095,7 @@ abstract class PhabricatorCustomField extends Phobject {
 
 
   public function getEditEngineFields(PhabricatorEditEngine $engine) {
-    $field = $this->newStandardEditField($engine);
+    $field = $this->newStandardEditField();
 
     return array(
       $field,