Bug 472631 - Private Browsing unit tests for password manager are not executed; r=dolske

toolkit/components/passwordmgr/test/test_privbrowsing.html

@@ -198,9 +198,6 @@ function get_PBSvc() {
   try {
     _PBSvc = Cc["@mozilla.org/privatebrowsing;1"].
              getService(Ci.nsIPrivateBrowsingService);
-    if (_PBSvc) {
-      observer.register();
-    }
     return _PBSvc;
   } catch (e) {}
   return null;