Enable reportUnusedDisableDirectives for ESLint, address new warning.

.eslintrc.json

@@ -22,6 +22,7 @@
       }
     }
   },
+  "reportUnusedDisableDirectives": true,
   "rules": {
     "array-bracket-spacing": ["error", "always"],
     "array-element-newline": "off",

schema/build-config-schema.js

@@ -38,7 +38,6 @@ const schema = {
 const tags = {};
 
 // Add rules
-// eslint-disable-next-line complexity
 rules.forEach(function forRule(rule) {
   rule.tags.forEach(function forTag(tag) {
     const tagRules = tags[tag] || [];