Revert "chore(window): support vue ssr"

Author: yuukinan

bin/tsw/runtime/Window.js

@@ -22,13 +22,3 @@ Window.prototype.enable = function() {
     global.windowHasDisabled = false;
 };
 
-//兼容vue-server-render
-Object.defineProperty(Window.prototype, 'navigator', {
-    get : function(){
-        if(this.request) {
-            return {userAgent:this.request.headers['user-agent']};
-        }else {
-            return {userAgent:''};
-        }
-    }
-});