Update README.md

Author: TatankaConCube

chat_sample/README.md

@@ -52,7 +52,6 @@ The app will automatically run on a selected iOS device or simulator.
 ### Run on Windows
 - Run command from the  Terminal `flutter run -d windows`;
 ### Run on Web
-- Add own `firebaseConfig` to the file `chat_sample/web/index.html`;
 - Run command from the  Terminal `flutter run -d chrome`;
 
 ### Configure Push notifications:
@@ -70,4 +69,4 @@ The app will automatically run on a selected iOS device or simulator.
 
 ## Can't build yourself?
 
-Got troubles with building Flutter code samples? Just create an issue at [Issues page](https://github.com/ConnectyCube/connectycube-flutter-samples/issues) - we will create the sample for you. For FREE!
+Got troubles with building Flutter code samples? Just create an issue at [Issues page](https://github.com/ConnectyCube/connectycube-flutter-samples/issues) - we will create the sample for you. For FREE!