Bug 841096 - Follow-up: remove debugging cruft. r=trivial

services/sync/modules/engines/tabs.js

@@ -121,7 +121,6 @@ TabStore.prototype = {
         continue;
       }
 
-      dump("WIN IS " + JSON.stringify(win)  + "\n");
       for (let tab of win.gBrowser.tabs) {
         tabState = this.getTabState(tab);