fix requirements and imports

app.py

@@ -2,16 +2,10 @@
 
 import vocode
 from vocode import getenv
-from vocode.streaming.models.message import BaseMessage
-from vocode.streaming.models.synthesizer import *
-from vocode.streaming.models.agent import *
-from vocode.streaming.models.transcriber import *
-from vocode.streaming.synthesizer import *
 import gradio as gr
 import os
 import logging
 
-
 from vocode.helpers import create_turn_based_microphone_input_and_speaker_output
 
 from vocode.turn_based.agent.chat_gpt_agent import ChatGPTAgent

requirements.txt

@@ -1,2 +1,2 @@
 vocode[io]
-google-cloud
+google-cloud-texttospeech