Remove the useless networking tag.

Since CtsNativeNetDnsTestCases only contain in mts-dnsresolver-tests-list-user.xml

Bug: 379792488

Change-Id: I750f0d9b360501554dfc7c693f5f4f3560c74930
diff --git a/tests/cts/net/native/dns/Android.bp b/tests/cts/net/native/dns/Android.bp
index de4a3bf..8138598 100644
--- a/tests/cts/net/native/dns/Android.bp
+++ b/tests/cts/net/native/dns/Android.bp
@@ -62,8 +62,6 @@
         "cts",
         "general-tests",
         "mts-dnsresolver",
-        "mts-networking",
         "mcts-dnsresolver",
-        "mcts-networking",
     ],
 }