ref(js): Remove UNSAFE_componentWillReceiveProps (#30663)

static/app/components/asyncComponent.tsx

@@ -114,9 +114,6 @@ export default class AsyncComponent<
     }
   }
 
-  // Compatibility shim for child classes that call super on this hook.
-  UNSAFE_componentWillReceiveProps(_newProps: P, _newContext: any) {}
-
   componentDidUpdate(prevProps: P, prevContext: any) {
     const isRouterInContext = !!prevContext.router;
     const isLocationInProps = prevProps.location !== undefined;