refactor(ads): remove duplicate doc comment in AdMobNativeAdWidget

- Removed redundant documentation above AdMobNativeAdWidget class
- The documentation for this widget was duplicated, which is unnecessary and can lead to confusion
- This change ensures the codebase adheres to better documentation practices

Author: fulleni

lib/ads/widgets/admob_native_ad_widget.dart

@@ -4,14 +4,6 @@ import 'package:flutter_news_app_mobile_client_full_source_code/ads/models/model
 import 'package:google_mobile_ads/google_mobile_ads.dart' as admob;
 import 'package:logging/logging.dart';
 
-/// {@template admob_native_ad_widget}
-/// A widget that specifically renders a Google AdMob native ad.
-///
-/// This widget is responsible for taking the generic [app_ad_models.NativeAd]
-/// and rendering it using the `AdWidget` from the `google_mobile_ads` package.
-/// It expects the `adObject` within the [app_ad_models.NativeAd] to be a fully
-/// loaded [admob.NativeAd] instance.
-/// {@endtemplate}
 /// {@template admob_native_ad_widget}
 /// A widget that specifically renders a Google AdMob native ad.
 ///