remove admob workaround

https://developers.google.com/admob/android/rel-notes#24.0.0

Author: thatfiredev

admob/app/src/main/AndroidManifest.xml

@@ -9,12 +9,6 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
 
-        <!-- workaround for https://github.com/firebase/firebase-cpp-sdk/issues/1545 -->
-        <property
-            android:name="android.adservices.AD_SERVICES_CONFIG"
-            android:resource="@xml/gma_ad_services_config"
-            tools:replace="android:resource" />
-
         <activity android:name="com.google.firebase.example.admob.MainActivity"
             android:exported="true">
             <intent-filter>