Remove all blimp network code.

blimp/net/stream_socket_connection.h

-// 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.
-
-#ifndef BLIMP_NET_STREAM_SOCKET_CONNECTION_H_
-#define BLIMP_NET_STREAM_SOCKET_CONNECTION_H_
-
-#include <memory>
-
-#include "blimp/net/blimp_connection.h"
-#include "net/socket/stream_socket.h"
-
-namespace net {
-class StreamSocket;
-}  // namespace net
-
-namespace blimp {
-
-// BlimpConnection specialization for StreamSocket-based connections.
-class StreamSocketConnection : public BlimpConnection {
- public:
-  explicit StreamSocketConnection(std::unique_ptr<net::StreamSocket> socket);
-
-  ~StreamSocketConnection() override;
-
- private:
-  std::unique_ptr<net::StreamSocket> socket_;
-};
-
-}  // namespace blimp
-
-#endif  // BLIMP_NET_STREAM_SOCKET_CONNECTION_H_