Restructure login

mash/init/public/interfaces/login.mojom

Index: mash/init/public/interfaces/login.mojom
diff --git a/mash/init/public/interfaces/login.mojom b/mash/init/public/interfaces/login.mojom
deleted file mode 100644
index 43661b48f3852d4a6aa62a3c5a880f3538a8d69d..0000000000000000000000000000000000000000
--- a/mash/init/public/interfaces/login.mojom
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-module mash.init.mojom;
-
-interface Login {
-  // TODO(beng): this should be guarded by a capability class.
-  LoginAs(string user_id);
-
-  Logout();
-  SwitchUser();
-};