Bug 895476: Remove extra dump call (r=paolo)

toolkit/components/jsdownloads/src/DownloadCore.jsm

@@ -467,7 +467,6 @@ Download.prototype = {
           this.speed = 0;
           this._notifyChange();
           if (this.succeeded) {
-            dump("we're good\n");
             yield DownloadIntegration.downloadDone(this);
 
             this._deferSucceeded.resolve();