Remove all //blimp code.

blimp/common/proto/compositor.proto

Index: blimp/common/proto/compositor.proto
diff --git a/blimp/common/proto/compositor.proto b/blimp/common/proto/compositor.proto
deleted file mode 100644
index add5eebc067e91335ce8ec95fced338a3df81931..0000000000000000000000000000000000000000
--- a/blimp/common/proto/compositor.proto
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2015 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.
-//
-// Message definitions for the compositor subprotocol.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-
-package blimp;
-
-message CompositorMessage {
-  // An ID that corresponds to RenderWidgetMessage.render_widget_id.
-  optional int32 render_widget_id = 1;
-
-  // This represents a serialized CompositorMessage in
-  // cc/proto/compositor_message.proto.
-  optional bytes payload = 2;
-}
-