Revert "Fix file.copy recipe_module to not fail if files are already equal."

scripts/slave/recipes/skia/swarm_trigger.expected/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot.json

Index: scripts/slave/recipes/skia/swarm_trigger.expected/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot.json
diff --git a/scripts/slave/recipes/skia/swarm_trigger.expected/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot.json b/scripts/slave/recipes/skia/swarm_trigger.expected/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot.json
index 5a7db1fc063d963b869d53e9e641ff4c0ef0508a..f9dd2b20ac397158204422232446ced679dd7783 100644
--- a/scripts/slave/recipes/skia/swarm_trigger.expected/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot.json
+++ b/scripts/slave/recipes/skia/swarm_trigger.expected/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot.json
@@ -740,7 +740,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport shutil\nimport sys\n# Apparently, shutil.copy fails if files are binary-equal on *nix OSes.\n# See http://crbug.com/636168#c8.\nif hasattr(shutil, '_samefile'):\n  if shutil._samefile(sys.argv[1], sys.argv[2]):\n    sys.exit(0)\nshutil.copy(sys.argv[1], sys.argv[2])\n",
+      "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/skia/infra/bots/assets/skp/VERSION",
       "/path/to/tmp/"
     ],
@@ -750,7 +750,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport shutil\nimport sys\n# Apparently, shutil.copy fails if files are binary-equal on *nix OSes.\n# See http://crbug.com/636168#c8.\nif hasattr(shutil, '_samefile'):\n  if shutil._samefile(sys.argv[1], sys.argv[2]):\n    sys.exit(0)\nshutil.copy(sys.argv[1], sys.argv[2])\n",
+      "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/skia/infra/bots/assets/skimage/VERSION",
       "/path/to/tmp/"
     ],
@@ -1080,7 +1080,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport shutil\nimport sys\n# Apparently, shutil.copy fails if files are binary-equal on *nix OSes.\n# See http://crbug.com/636168#c8.\nif hasattr(shutil, '_samefile'):\n  if shutil._samefile(sys.argv[1], sys.argv[2]):\n    sys.exit(0)\nshutil.copy(sys.argv[1], sys.argv[2])\n",
+      "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/swarming_temp_dir/outputs/perf_skia/0/perfdata/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot/data/nanobench_9046e2e693bb92a76e972b694580e5d17ad10748.json",
       "[SLAVE_BUILD]/perfdata/Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Trybot/data/nanobench_9046e2e693bb92a76e972b694580e5d17ad10748_1408633190.json"
     ],