Remove unused tools and unused includes of SkImageDecoder

tools/skiaserve/skiaserve.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Request.h"
 #include "Response.h"
 
 #include "SkCommandLineFlags.h"
 
 #include "microhttpd.h"
 
 #include "urlhandlers/UrlHandler.h"
 #include <sys/socket.h>
 
 using namespace Response;
 
-// To get image decoders linked in we have to do the below magic
-#include "SkForceLinking.h"
-#include "SkImageDecoder.h"
-__SK_FORCE_IMAGE_DECODER_LINKING;
-
 DEFINE_int32(port, 8888, "The port to listen on.");
 
 class UrlManager {
 public:
     UrlManager() {
         // Register handlers
         fHandlers.push_back(new RootHandler);
         fHandlers.push_back(new PostHandler);
         fHandlers.push_back(new ImgHandler);
         fHandlers.push_back(new ClipAlphaHandler);
@@ skipping 60 matching lines @@
     MHD_stop_daemon(daemon);
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return skiaserve_main();
 }
 #endif