remove unused network security config

Author: krystofwoldrich

samples/react-native/android/app/src/main/AndroidManifest.xml

@@ -9,8 +9,7 @@
       android:roundIcon="@mipmap/ic_launcher_round"
       android:allowBackup="false"
       android:theme="@style/AppTheme"
-      android:supportsRtl="true"
-      android:networkSecurityConfig="@xml/network_security_config">
+      android:supportsRtl="true">
       <activity
         android:name=".MainActivity"
         android:label="@string/app_name"