chore: remove now-unused utils.inherits (#5766)

Author: mark-wiemer

lib/utils.js

@@ -9,24 +9,12 @@
  * Module dependencies.
  */
 var path = require("node:path");
-var util = require("node:util");
 var he = require("he");
 var pc = require("picocolors");
 var isUnicodeSupported = require("is-unicode-supported")();
 
 const MOCHA_ID_PROP_NAME = "__mocha_id__";
 
-/**
- * Inherit the prototype methods from one constructor into another.
- *
- * @param {function} ctor - Constructor function which needs to inherit the
- *     prototype.
- * @param {function} superCtor - Constructor function to inherit prototype from.
- * @throws {TypeError} if either constructor is null, or if super constructor
- *     lacks a prototype.
- */
-exports.inherits = util.inherits;
-
 /**
  * Escape special characters in the given string of html.
  *