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

scripts/slave/recipes/skia/swarm_trigger.expected/Test-Win8-MSVC-ShuttleA-GPU-HD7770-x86_64-Release.json

Index: scripts/slave/recipes/skia/swarm_trigger.expected/Test-Win8-MSVC-ShuttleA-GPU-HD7770-x86_64-Release.json
diff --git a/scripts/slave/recipes/skia/swarm_trigger.expected/Test-Win8-MSVC-ShuttleA-GPU-HD7770-x86_64-Release.json b/scripts/slave/recipes/skia/swarm_trigger.expected/Test-Win8-MSVC-ShuttleA-GPU-HD7770-x86_64-Release.json
index 3d516ad9d9b8aa054134df386d9fa80fd34319e4..04170152306c04d0e0f0c680de5f0b7d1ee9b2f3 100644
--- a/scripts/slave/recipes/skia/swarm_trigger.expected/Test-Win8-MSVC-ShuttleA-GPU-HD7770-x86_64-Release.json
+++ b/scripts/slave/recipes/skia/swarm_trigger.expected/Test-Win8-MSVC-ShuttleA-GPU-HD7770-x86_64-Release.json
@@ -481,7 +481,7 @@
     "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/win_toolchain/VERSION",
       "/path/to/tmp/"
     ],
@@ -727,7 +727,7 @@
     "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/"
     ],
@@ -737,7 +737,7 @@
     "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/"
     ],