Bug 1578826 - fix browser-chrome kvstore failure r=Gijs

Differential Revision: https://phabricator.services.mozilla.com/D45008

--HG--
extra : moz-landing-system : lando

browser/base/content/test/static/browser_all_files_referenced.js

@@ -224,12 +224,6 @@ var whitelist = [
   { file: "chrome://browser/content/aboutlogins/aboutLoginsUtils.js" },
 ];
 
-if (!AppConstants.MOZ_NEW_NOTIFICATION_STORE) {
-  // kvstore.jsm wraps the API in nsIKeyValue.idl in a more ergonomic API
-  // It landed in bug 1490496, and we expect to start using it shortly.
-  whitelist.push({ file: "resource://gre/modules/kvstore.jsm" });
-}
-
 whitelist = new Set(
   whitelist
     .filter(