Delete flaky benchmark test

tests/benchmark/benchmark_life.cc

 // Copyright 2014 The Native Client Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
-// @EXEMPTION[include]
-#include "./framework.h"
-#include "./thread_pool.h"
+#include "native_client/tests/benchmark/framework.h"
+#include "native_client/tests/benchmark/thread_pool.h"
 
 
 using sdk_util::ThreadPool;  // For sdk_util::ThreadPool
 
 namespace {
 
 const int kCellAlignment = 0x10;
 const int kWidth = 2048;
 const int kHeight = 2048;
 
@@ skipping 206 matching lines @@
 #endif
   }
  private:
   Life life_;
 };
 
 }  // namespace
 
 // Register an instance to the list of benchmarks to be run.
 RegisterBenchmark<BenchmarkLife> benchmark_life;