Remove unused tools and unused includes of SkImageDecoder

tools/kilobench/kilobench.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 "GrCaps.h"
 #include "GrContextFactory.h"
 #include "Benchmark.h"
@@ skipping 16 matching lines @@
 // posix only for now
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
 /*
  * This is an experimental GPU only benchmarking program.  The initial implementation will only
  * support SKPs.
  */
 
-// To get image decoders linked in we have to do the below magic
-#include "SkForceLinking.h"
-#include "SkImageDecoder.h"
-__SK_FORCE_IMAGE_DECODER_LINKING;
-
 static const int kAutoTuneLoops = 0;
 
 static const int kDefaultLoops =
 #ifdef SK_DEBUG
     1;
 #else
     kAutoTuneLoops;
 #endif
 
 static SkString loops_help_txt() {
@@ skipping 603 matching lines @@
     }
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return kilobench_main();
 }
 #endif