Follow-up checkin to bug 165653.

Drop Firebird's dependency on Gecko's DOM for the sidebar; it should provide it itself.
Patch=caillon
r=bryner
sr=jst

dom/public/idl/sidebar/nsISidebar.idl

@@ -24,13 +24,9 @@
 
 #include "nsISupports.idl"
 
-interface nsIDOMWindowInternal;
-
 [scriptable, uuid(577CB745-8CAF-11d3-AAEF-00805F8A4905)]
 interface nsISidebar : nsISupports
 {
-
-    void setWindow (in nsIDOMWindowInternal aWindow);
     void addPanel(in wstring aTitle, in string aContentURL,
                   in string aCustomizeURL);
     void addPersistentPanel(in wstring aTitle, in string aContentURL,