docs(analytics): remove duplicate docs section

docs addition is excellent, but once is sufficient

Author: mikehardy

docs/analytics/usage/index.mdx

@@ -169,21 +169,6 @@ During `pod install`, using that variable installs the `FirebaseAnalytics/Core`
 or Firebase Analytics without needing the App Tracking Transparency handling (assuming no other parts
 of your app handle data in a way that requires ATT)
 
-If you use Expo, including EAS Build, add the Analytics config plugin to your `app.json` / `app.config.js` instead of editing the generated Podfile manually:
-
-```json
-[
-  "@react-native-firebase/analytics",
-  {
-    "ios": {
-      "withoutAdIdSupport": true
-    }
-  }
-]
-```
-
-This adds `$RNFirebaseAnalyticsWithoutAdIdSupport = true` to the generated iOS `Podfile` during prebuild.
-
 Note that for obvious reasons, configuring Firebase Analytics for use without IDFA is incompatible with AdMob
 
 # Google Analytics on-device conversion measurement