Bug 1778155 - Finish enabling no-unused-vars on the global scope for xpcshell files in services/. r=leplatrem

Differential Revision: https://phabricator.services.mozilla.com/D151035

.eslintrc.js

@@ -219,7 +219,6 @@ module.exports = {
         "dom/**",
         "netwerk/**",
         "security/manager/ssl/tests/unit/**",
-        "services/**",
         "testing/xpcshell/**",
         "toolkit/components/**",
         "toolkit/modules/**",

services/settings/test/unit/test_remote_settings_recover_broken.js

@@ -1,8 +1,5 @@
 /* import-globals-from ../../../common/tests/unit/head_helpers.js */
 
-const { AppConstants } = ChromeUtils.import(
-  "resource://gre/modules/AppConstants.jsm"
-);
 const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
 
 const { SyncHistory } = ChromeUtils.import(