Unrequire filling Owners in Owners tool

Summary:
Owners field is filled by Primary Owner which is required.
So that it is not neccessary to require filling Owners explicitly.

Test Plan: Don't fill Owners and successfully save the form //before// this change.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Differential Revision: https://secure.phabricator.com/D2201

src/applications/owners/controller/edit/PhabricatorOwnersEditController.php

@@ -41,7 +41,6 @@ final class PhabricatorOwnersEditController
 
     $e_name = true;
     $e_primary = true;
-    $e_owners = true;
 
     $errors = array();
 
@@ -88,13 +87,6 @@ final class PhabricatorOwnersEditController
         $e_primary = null;
       }
 
-      if (!$owners) {
-        $e_owners = 'Required';
-        $errors[] = 'Package must have at least one owner.';
-      } else {
-        $e_owners = null;
-      }
-
       if (!$path_refs) {
         $errors[] = 'Package must include at least one path.';
       }
@@ -214,8 +206,7 @@ final class PhabricatorOwnersEditController
           ->setDatasource('/typeahead/common/usersorprojects/')
           ->setLabel('Owners')
           ->setName('owners')
-          ->setValue($token_all_owners)
-          ->setError($e_owners))
+          ->setValue($token_all_owners))
       ->appendChild(
         id(new AphrontFormSelectControl())
           ->setName('auditing')