Remove all //blimp code.

blimp/common/proto/blob_channel.proto

Index: blimp/common/proto/blob_channel.proto
diff --git a/blimp/common/proto/blob_channel.proto b/blimp/common/proto/blob_channel.proto
deleted file mode 100644
index 0f862f71cb2e426f8f6a2d3f156b1cc94b219201..0000000000000000000000000000000000000000
--- a/blimp/common/proto/blob_channel.proto
+++ /dev/null
@@ -1,21 +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.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-
-package blimp;
-
-message TransferBlob {
-  optional string blob_id = 1;
-  optional bytes payload = 2;
-}
-
-message BlobChannelMessage {
-  oneof type {
-    // Engine => Client types.
-    TransferBlob transfer_blob = 1;
-  }
-}