chore(template): drop the privateNetworkClientServer capability

A runFullTrust app doesn't run in an AppContainer, so the capability gated nothing and only
added a "home or work networks" disclosure to the Store listing. internetClient stays; an app
or plugin that wants the capability can add it through the manifest merger.

Author: triniwiz

template/framework/__PROJECT_NAME__/Package.appxmanifest

@@ -30,6 +30,5 @@
   <Capabilities>
     <rescap:Capability Name="runFullTrust" />
     <Capability Name="internetClient" />
-    <Capability Name="privateNetworkClientServer" />
   </Capabilities>
 </Package>