Remove all //blimp code.

blimp/test/fake_engine/proto/engine.proto

-// 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 = "proto3";
-
-// TODO(xyzzyz): Update proto service/message definitions once we have
-// determined the final Engine/Service interface.
-
-package blimp;
-
-option optimize_for = LITE_RUNTIME;
-
-message CheckHealthRequest {}
-message CheckHealthResponse {
-  enum Status {
-    UNKNOWN = 0;
-    OK = 1;
-    NOT_OK = 2;
-  }
-
-  Status status = 1;
-}
-
-message ShutDownRequest {}
-message ShutDownResponse {}
-
-service Engine {
-  // Returns health status of the Engine.
-  rpc CheckHealth (CheckHealthRequest) returns (CheckHealthResponse) {}
-  // Makes the Engine shut down itself.
-  rpc ShutDown(ShutDownRequest) returns (ShutDownResponse) {}
-}