build: upgrade @types/jasminewd2 to 2.0.4 (#26432)

This commit also removes the extra jasminewd2 typings, since the
changes have been merged in the official typings with
DefinitelyTyped/DefinitelyTyped#28957.

modules/types.d.ts

@@ -13,6 +13,5 @@
 /// <reference types="jasminewd2" />
 /// <reference types="node" />
 /// <reference types="zone.js" />
-/// <reference path="../tools/types-ext/jasminewd2.d.ts" />
 /// <reference path="./es6-subset.d.ts" />
 /// <reference path="./system.d.ts" />