Bug 1773220 - Remove a couple of references to .xul from the ESLint setup code. r=Gijs

Depends on D148627

Differential Revision: https://phabricator.services.mozilla.com/D148628

.eslintrc.js

@@ -96,7 +96,6 @@ module.exports = {
       files: [
         "*.html",
         "*.xhtml",
-        "*.xul",
         "*.xml",
         "js/src/builtin/**/*.js",
         "js/src/shell/**/*.js",

tools/lint/eslint/eslint-plugin-mozilla/lib/globals.js

@@ -60,8 +60,8 @@ const globalCache = new Map();
 
 /**
  * Global discovery can occasionally meet circular dependencies due to the way
- * js files are included via xul files etc. This set is used to avoid getting
+ * js files are included via html/xhtml files etc. This set is used to avoid
- * into loops whilst the discovery is in progress.
+ * getting into loops whilst the discovery is in progress.
  */
 var globalDiscoveryInProgressForFiles = new Set();