chore: remove missing setup instructions for Android

Author: CAMOBAP

packages/react-native-sandbox/README.md

@@ -24,14 +24,10 @@ npm install @callstack/react-native-sandbox
 yarn add @callstack/react-native-sandbox
 ```
 
-### iOS Setup
+### Setup
 
 The package uses **autolinking** and supports the **React Native New Architecture** - no manual configuration required.
 
-### Android Setup
-
-> 🚧 **Under Construction** - Android support is currently in development. Stay tuned for updates!
-
 ## 🎯 Basic Usage
 
 > For complete examples with both host and sandbox code, see the [project examples](https://github.com/callstackincubator/react-native-sandbox#-api-example).