Don't load unnecessary handle data on "transaction.search"

Summary: Ref T13242. Currently, the transaction query loads handles by default (this is unusual). We don't need them, so turn them off.

Test Plan: No apparent behavioral change, will compare production profiles.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13242

Differential Revision: https://secure.phabricator.com/D20068

src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php

@@ -68,6 +68,7 @@ final class TransactionSearchConduitAPIMethod
       $object);
 
     $xaction_query
+      ->needHandles(false)
       ->withObjectPHIDs(array($object->getPHID()))
       ->setViewer($viewer);