remove warning about SingletonHooksContainer unmount (#324)

Author: vadikoom

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-singleton-hook",
-  "version": "3.2.0",
+  "version": "3.2.1",
   "description": "Share custom hook state across all components",
   "keywords": [
     "react",

src/components/SingletonHooksContainer.js

@@ -20,7 +20,6 @@ export const SingletonHooksContainer = () => {
         + 'Alternatively, dont use SingletonHooksContainer it at all, we will handle that for you.');
     }
     SingletonHooksContainerMounted = true;
-    return () => process.env.NODE_ENV !== 'test' && warning('SingletonHooksContainer is removed from DOM. its not supported, singleton hooks will stop updating.');
   }, []);
 
   const [hooks, setHooks] = useState([]);