--- a/editor/libeditor/HTMLEditorObjectResizer.cpp
+++ b/editor/libeditor/HTMLEditorObjectResizer.cpp
@@ -815,19 +815,16 @@ HTMLEditor::MouseMove(nsIDOMEvent* aMous
   return MouseMove(mouseEvent);
 }
 
 nsresult
 HTMLEditor::MouseMove(nsIDOMMouseEvent* aMouseEvent)
 {
   MOZ_ASSERT(aMouseEvent);
 
-  NS_NAMED_LITERAL_STRING(leftStr, "left");
-  NS_NAMED_LITERAL_STRING(topStr, "top");
-
   if (mIsResizing) {
     // we are resizing and the mouse pointer's position has changed
     // we have to resdisplay the shadow
     int32_t clientX, clientY;
     aMouseEvent->GetClientX(&clientX);
     aMouseEvent->GetClientY(&clientY);
 
     int32_t newX = GetNewResizingX(clientX, clientY);