Deprecate old implementation around providing network to ferrochrome

Bug: 325929096
Test: Run ferrochrome with VmLauncherApp
Change-Id: I4231ec5b3ba32a1d4df5782232e3fecb1ae83514
diff --git a/vmlauncher_app/AndroidManifest.xml b/vmlauncher_app/AndroidManifest.xml
index d800ec7..f4f13af 100644
--- a/vmlauncher_app/AndroidManifest.xml
+++ b/vmlauncher_app/AndroidManifest.xml
@@ -7,8 +7,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-feature android:name="android.software.virtualization_framework" android:required="true" />
     <application
-        android:label="VmLauncherApp"
-        android:networkSecurityConfig="@xml/network_security_config">
+        android:label="VmLauncherApp">
         <activity android:name=".MainActivity"
                   android:enabled="false"
                   android:screenOrientation="landscape"