Remove old style addon test

src/public/Terminal.test.ts

@@ -1,17 +0,0 @@
-/**
- * Copyright (c) 2016 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { assert } from 'chai';
-import { Terminal } from './Terminal';
-import * as attach from '../addons/attach/attach';
-
- describe('Terminal', () => {
-  it('should apply addons with Terminal.applyAddon', () => {
-    Terminal.applyAddon(attach);
-    // Test that addon was applied successfully, adding attach to Terminal's
-    // prototype.
-    assert.equal(typeof (<any>Terminal).prototype.attach, 'function');
-  });
-});