Removed redundant default explanation

Author: riqts

docs/rtk-query/usage/polling.mdx

@@ -17,7 +17,7 @@ Polling gives you the ability to have a 'real-time' effect by causing a query to
 :::tip
 Polling additionally has the ability to skip sending requests while the window is out of focus. To enable this behavior, pass `skipPollingIfUnfocused: true` to the `useQuery` hook or action creator.
 
-_Note: `skipPollingIfUnfocused` requires [`setupListeners`](../api/setupListeners.mdx) to have been called and is disabled by default_
+_Note: `skipPollingIfUnfocused` requires [`setupListeners`](../api/setupListeners.mdx) to have been called._
 :::
 
 ```tsx no-transpile title="src/Pokemon.tsx" no-transpile