Update README

Author: wong2

README.md

@@ -16,12 +16,6 @@
 
 ![Screenshot](screenshots/extension.png?raw=true)
 
-## 🤝 Sponsors
-
-<a href="https://getstream.io/chat/sdk/react/?utm_source=github&utm_medium=referral&utm_content=&utm_campaign=wong2">
-  <img src="screenshots/stream-logo.jpg" width="200" />
-</a>
-
 ## ✨ Features
 
 - 🤖 Use different chatbots in one app, currently supporting ChatGPT, new Bing Chat, Google Bard, Claude, and open-source models including LLama2, Vicuna, ChatGLM etc