tools: enable no-useless-backreference lint rule

PR-URL: #31400
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Rich Trott <[email protected]>

Author: cjihrig

.eslintrc.js

@@ -274,6 +274,7 @@ module.exports = {
       functions: false,
       variables: false,
     }],
+    'no-useless-backreference': 'error',
     'no-useless-call': 'error',
     'no-useless-catch': 'error',
     'no-useless-concat': 'error',