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

scripts/slave/recipes/chromedriver.expected/Android_ChromeDriver_Tests__dbg__test_failure.json

Index: scripts/slave/recipes/chromedriver.expected/Android_ChromeDriver_Tests__dbg__test_failure.json
diff --git a/scripts/slave/recipes/chromedriver.expected/Android_ChromeDriver_Tests__dbg__test_failure.json b/scripts/slave/recipes/chromedriver.expected/Android_ChromeDriver_Tests__dbg__test_failure.json
index 71a0d9f62b11d2d8da1e42fe8b1998edeaa14790..5f4981288867fe612086814e4e8cd57fee6b504d 100644
--- a/scripts/slave/recipes/chromedriver.expected/Android_ChromeDriver_Tests__dbg__test_failure.json
+++ b/scripts/slave/recipes/chromedriver.expected/Android_ChromeDriver_Tests__dbg__test_failure.json
@@ -445,7 +445,7 @@
     "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]/src/chrome/VERSION",
       "/path/to/tmp/"
     ],
@@ -471,7 +471,7 @@
     "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]/src/chrome/VERSION",
       "/path/to/tmp/"
     ],
@@ -1049,7 +1049,7 @@
     "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",
       "[TMP_BASE]/results_log_tmp_10/android_log.json",
       "/path/to/tmp/"
     ],
@@ -1180,7 +1180,7 @@
     "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]/src/chrome/VERSION",
       "/path/to/tmp/"
     ],