Revert "Set EthernetNetworkSpecifier on each ethernet network for multi-ethernet"

This reverts commit b94c4e7453.

Reason for revert: b/196387077

Change-Id: I8e27ce915b6069b642c614a018aa5e1788ae07af

service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java

@@ -146,10 +146,6 @@ public class EthernetNetworkFactory extends NetworkFactory {
             return;
         }
 
-        capabilities = new NetworkCapabilities.Builder(capabilities)
-                .setNetworkSpecifier(new EthernetNetworkSpecifier(ifaceName))
-                .build();
-
         if (DBG) {
             Log.d(TAG, "addInterface, iface: " + ifaceName + ", capabilities: " + capabilities);
         }