revert mockVoiceActivity

Author: pranavjoshi001

src/directLine.mock.ts

@@ -11,18 +11,6 @@ const notImplemented = (): never => { throw new Error('not implemented') };
 
 export const mockActivity = (text: string): DirectLineExport.Activity => ({ type: 'message', from: { id: 'sender' }, text });
 
-export const mockVoiceActivity = (): DirectLineExport.Activity => ({
-    type: 'event',
-    from: { id: 'sender' },
-    name: 'voiceEvent',
-    value: {
-        voice: {
-            contentType: 'type',
-            contentUrl: 'base64AudioChunk'
-        }
-    }
-});
-
 // MOCK DirectLine Server (shared state used by Observable.ajax and WebSocket mocks)
 
 interface ActivitySocket {