Fix: Use token utilities from eslint-utils (#156)

lib/rules/no-only-tests.js

@@ -1,36 +1,7 @@
 'use strict';
 
 const utils = require('../utils');
-
-/**
- * Checks if the given token is a comma token or not.
- * From: https://github.com/eslint/eslint/blob/master/lib/rules/utils/ast-utils.js
- * @param {Token} token The token to check.
- * @returns {boolean} `true` if the token is a comma token.
- */
-function isCommaToken (token) {
-  return token.value === ',' && token.type === 'Punctuator';
-}
-
-/**
- * Checks if the given token is an opening brace token or not.
- * From: https://github.com/eslint/eslint/blob/master/lib/rules/utils/ast-utils.js
- * @param {Token} token The token to check.
- * @returns {boolean} `true` if the token is an opening brace token.
- */
-function isOpeningBraceToken (token) {
-  return token.value === '{' && token.type === 'Punctuator';
-}
-
-/**
- * Checks if the given token is a closing brace token or not.
- * From: https://github.com/eslint/eslint/blob/master/lib/rules/utils/ast-utils.js
- * @param {Token} token The token to check.
- * @returns {boolean} `true` if the token is a closing brace token.
- */
-function isClosingBraceToken (token) {
-  return token.value === '}' && token.type === 'Punctuator';
-}
+const { isCommaToken, isOpeningBraceToken, isClosingBraceToken } = require('eslint-utils');
 
 module.exports = {
   meta: {