Merge pull request zendframework/zendframework#2369 branch 'hotfix/re…

…move-unused-vars'

src/Acl.php

@@ -839,7 +839,7 @@ protected function roleDFSVisitAllPrivileges(Role\RoleInterface $role, Resource\
         }
 
         $dfs['visited'][$role->getRoleId()] = true;
-        foreach ($this->getRoleRegistry()->getParents($role) as $roleParentId => $roleParent) {
+        foreach ($this->getRoleRegistry()->getParents($role) as $roleParent) {
             $dfs['stack'][] = $roleParent;
         }
 
@@ -925,7 +925,7 @@ protected function roleDFSVisitOnePrivilege(Role\RoleInterface $role, Resource\R
         }
 
         $dfs['visited'][$role->getRoleId()] = true;
-        foreach ($this->getRoleRegistry()->getParents($role) as $roleParentId => $roleParent) {
+        foreach ($this->getRoleRegistry()->getParents($role) as $roleParent) {
             $dfs['stack'][] = $roleParent;
         }