To remove a button in the Telegram Web app, you need to modify the JavaScript code. However, please note that modifying the Telegram Web app's code is generally not recommended as it may violate Telegram's terms of service.
The specific location of the `telegram-web-app.js` file may vary depending on the platform you are using:
- **Windows**: The `telegram-web-app.js` file is usually located in the `C:\Users\[Your Username]\AppData\Roaming\Telegram Desktop\[Version Number]\resources` folder.
- **Mac**: The `telegram-web-app.js` file is typically found in the `~/Library/Application Support/Telegram Desktop/[Version Number]/resources` folder.
- **Linux**: The `telegram-web-app.js` file might be located in the `~/.config/TelegramDesktop/[Version Number]/resources` folder.
Again, it's worth mentioning that modifying the Telegram Web app's code may lead to unexpected consequences, and it's generally advised not to do so.