Remove old event emitter

Fixes #2029

src/common/EventEmitter.test.ts

@@ -1,77 +0,0 @@
-/**
- * Copyright (c) 2017 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { assert } from 'chai';
-import { EventEmitter } from 'common/EventEmitter';
-
-describe('EventEmitter', () => {
-  let eventEmitter: EventEmitter;
-
-  beforeEach(() => {
-    eventEmitter = new EventEmitter();
-  });
-
-  describe('emit', () => {
-    it('should emit events to listeners', () => {
-      let count1 = 0;
-      let count2 = 0;
-      const listener1 = () => count1++;
-      const listener2 = () => count2++;
-      eventEmitter.on('test', listener1);
-      eventEmitter.on('test', listener2);
-      eventEmitter.emit('test');
-      assert.equal(count1, 1);
-      assert.equal(count2, 1);
-      eventEmitter.emit('test');
-      assert.equal(count1, 2);
-      assert.equal(count2, 2);
-    });
-
-    it('should manage multiple listener types', () => {
-      let count1 = 0;
-      let count2 = 0;
-      const listener1 = () => count1++;
-      const listener2 = () => count2++;
-      eventEmitter.on('test', listener1);
-      eventEmitter.on('foo', listener2);
-      eventEmitter.emit('test');
-      assert.equal(count1, 1);
-      assert.equal(count2, 0);
-      eventEmitter.emit('foo');
-      assert.equal(count1, 1);
-      assert.equal(count2, 1);
-    });
-  });
-
-  describe('listeners', () => {
-    it('should return listeners for the type requested', () => {
-      assert.equal(eventEmitter.listeners('test').length, 0);
-      const listener = () => {};
-      eventEmitter.on('test', listener);
-      assert.deepEqual(eventEmitter.listeners('test'), [listener]);
-    });
-  });
-
-  describe('off', () => {
-    it('should remove the specific listener', () => {
-      const listener1 = () => {};
-      const listener2 = () => {};
-      eventEmitter.on('foo', listener1);
-      eventEmitter.on('foo', listener2);
-      assert.equal(eventEmitter.listeners('foo').length, 2);
-      eventEmitter.off('foo', listener1);
-      assert.deepEqual(eventEmitter.listeners('foo'), [listener2]);
-    });
-  });
-
-  describe('removeAllListeners', () => {
-    it('should clear all listeners', () => {
-      eventEmitter.on('foo', () => {});
-      assert.equal(eventEmitter.listeners('foo').length, 1);
-      eventEmitter.removeAllListeners('foo');
-      assert.equal(eventEmitter.listeners('foo').length, 0);
-    });
-  });
-});