OXDEV-7758 Remove dead schema link from readme

README.md

@@ -16,8 +16,7 @@ This module provides:
 
 ## Documentation
 
-* Full documentation can be found [here](https://docs.oxid-esales.com/interfaces/graphql/en/latest/).
-* Schema documentation available [here](https://oxid-esales.github.io/graphql-storefront-module).
+* Full documentation, including GraphQL schema, can be found [here](https://docs.oxid-esales.com/interfaces/graphql/en/latest/).
 
 ## Usage