Revert "issue cocos2d#1108: add two method cleanScript and restart"

This reverts commit 765e890.

Author: jianglong0156

CCBoot.js

@@ -1673,17 +1673,6 @@ cc._initSys = function (config, CONFIG_KEY) {
         // N/A in cocos2d-html5
     };
 
-    /**
-     * cleanScript the singal JS file
-     * @memberof cc.sys
-     * @name cleanScript
-     * @param {String} jsfile
-     * @function
-     */
-    sys.cleanScript = function (jsfile) {
-        // N/A in cocos2d-html5
-    };
-
     /**
      * Dump system informations
      * @memberof cc.sys
@@ -2045,13 +2034,6 @@ cc.game = /** @lends cc.game# */{
         self._paused = false;
     },
 
-    /**
-     * Run game.
-     */
-    restart: function () {
-        window.location.href = window.location.href;
-    },
-
     /**
      * Run game.
      */