Fix a bug for updating diffs

Summary: Hit this issue in D8485. I think reviewedByPHID changes should appear in application transactions.

Test Plan: Would like to deploy this and try updating D8485 again.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: aran, epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8491

src/applications/differential/conduit/ConduitAPI_differential_Method.php

@@ -80,11 +80,7 @@ abstract class ConduitAPI_differential_Method extends ConduitAPIMethod {
 
       $role = PhabricatorCustomField::ROLE_APPLICATIONTRANSACTIONS;
       if (!$field->shouldEnableForRole($role)) {
-        throw new Exception(
-          pht(
-            'Request attempts to update field "%s", but that field can not '.
-            'perform transactional updates.',
-            $key));
+        continue;
       }
 
       // TODO: This is fairly similar to PhabricatorCustomField's