[infra] Translate _sources.gypi files to _sources.gni files

runtime/vm/service_sources.gypi

Index: runtime/vm/service_sources.gypi
diff --git a/runtime/vm/service_sources.gypi b/runtime/vm/service_sources.gypi
deleted file mode 100644
index a0de7e9d8801bf87441c8cf7c30a9bc0a48a8c18..0000000000000000000000000000000000000000
--- a/runtime/vm/service_sources.gypi
+++ /dev/null
@@ -1,15 +0,0 @@
-# Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-{
-  'sources': [
-    'service/client.dart',
-    'service/constants.dart',
-    'service/message.dart',
-    'service/message_router.dart',
-    'service/running_isolate.dart',
-    'service/running_isolates.dart',
-    'service/vmservice.dart',
-  ]
-}