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

scripts/slave/recipes/bisection/android_bisect.expected/local_basic_recipe_disconnected_device.json

Index: scripts/slave/recipes/bisection/android_bisect.expected/local_basic_recipe_disconnected_device.json
diff --git a/scripts/slave/recipes/bisection/android_bisect.expected/local_basic_recipe_disconnected_device.json b/scripts/slave/recipes/bisection/android_bisect.expected/local_basic_recipe_disconnected_device.json
index 05fd3f832c1c5ee4240c2549b49233781b35875f..2e80959c0962bce2dab2f30663adeba47875dd1f 100644
--- a/scripts/slave/recipes/bisection/android_bisect.expected/local_basic_recipe_disconnected_device.json
+++ b/scripts/slave/recipes/bisection/android_bisect.expected/local_basic_recipe_disconnected_device.json
@@ -1037,7 +1037,7 @@
     "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",
       "[BUILDER_CACHE]/android_one_perf_bisect/src/chrome/VERSION",
       "/path/to/tmp/"
     ],
@@ -1503,7 +1503,7 @@
     "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",
       "[BUILDER_CACHE]/android_one_perf_bisect/src/chrome/VERSION",
       "/path/to/tmp/"
     ],
@@ -2344,7 +2344,7 @@
     "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",
       "[BUILDER_CACHE]/android_one_perf_bisect/src/chrome/VERSION",
       "/path/to/tmp/"
     ],
@@ -2810,7 +2810,7 @@
     "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",
       "[BUILDER_CACHE]/android_one_perf_bisect/src/chrome/VERSION",
       "/path/to/tmp/"
     ],
@@ -3427,7 +3427,7 @@
     "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",
       "[BUILDER_CACHE]/android_one_perf_bisect/src/chrome/VERSION",
       "/path/to/tmp/"
     ],