Remove the last bits of the Sky Inspector

sky/services/inspector/inspector.mojom

Index: sky/services/inspector/inspector.mojom
diff --git a/sky/services/inspector/inspector.mojom b/sky/services/inspector/inspector.mojom
deleted file mode 100644
index 0ed53658b24e6d2d7370f65e9864e6dd4afec75e..0000000000000000000000000000000000000000
--- a/sky/services/inspector/inspector.mojom
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2014 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 sky;
-
-interface InspectorFrontend {
-  SendMessage(string message);
-};
-
-interface InspectorBackend {
-  OnConnect();
-  OnDisconnect();
-  OnMessage(string message);
-};