diff --git a/sky/tools/roll/roll.py.orig b/sky/tools/roll/roll.py.orig
deleted file mode 100755
index 5389d638b71d812109c968ec360e627ddf31e7cf..0000000000000000000000000000000000000000
--- a/sky/tools/roll/roll.py.orig
+++ /dev/null
@@ -1,153 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import argparse
-import json
-import os
-import subprocess
-import sys
-import urllib2
-from utils import commit
-from utils import system
-import patch
-
-# //base and its dependencies
-_base_deps = [
-    'base',
-    'testing',
-    'third_party/ashmem',
-    'third_party/libevent',
-    'third_party/libxml', # via //base/test
-    'third_party/modp_b64',
-    'third_party/tcmalloc',
-]
-
-# //build and its dependencies
-_build_deps = [
-    'build',
-    'third_party/android_testrunner',
-    'third_party/binutils',
-    'third_party/instrumented_libraries',
-    'third_party/pymock',
-    'tools/android',
-    'tools/clang',
-    'tools/generate_library_loader',
-    'tools/gritsettings',
-    'tools/valgrind',
-]
-
-_chromium_libs = [
-    'crypto',
-    'url',
-]
-
-_third_party_deps = [
-    'third_party/android_platform',
-    'third_party/apple_apsl',
-    'third_party/brotli',
-    'third_party/expat',
-    'third_party/freetype-android',
-    'third_party/harfbuzz-ng',
-    'third_party/iccjpeg',
-    'third_party/jinja2',
-    'third_party/jsr-305',
-    'third_party/junit',
-    'third_party/khronos',
-    'third_party/libjpeg',
-    'third_party/libpng',
-    'third_party/libXNVCtrl',
-    'third_party/markupsafe',
-    'third_party/mesa',
-    'third_party/mockito',
-    'third_party/ots',
-    'third_party/ply',
-    'third_party/qcms',
-    'third_party/re2',
-    'third_party/robolectric',
-    'third_party/zlib',
-]
-
-dirs_from_chromium = _base_deps + _build_deps + _chromium_libs + _third_party_deps
-
-dirs_from_mojo = [
-    'gpu',
-    'mojo',
-    'mojom',
-    'services/android',
-    'services/asset_bundle',
-    'services/keyboard',
-    'services/sensors',
-]
-
-# The contents of these files before the roll will be preserved after the roll,
-# even though they live in directories rolled in from Chromium.
-files_not_to_roll = [
-    'build/config/crypto.gni',
-    'build/config/ui.gni',
-    'build/ls.py',
-    'build/module_args/mojo.gni',
-    'crypto/BUILD.gn',
-    'gpu/BUILD.gn',
-    'tools/android/download_android_tools.py',
-    'tools/android/VERSION_LINUX_NDK',
-    'tools/android/VERSION_LINUX_SDK',
-    'tools/android/VERSION_MACOSX_NDK',
-    'tools/android/VERSION_MACOSX_SDK',
-]
-
-
-def rev(source_dir, dest_dir, dirs_to_rev, name):
-    for d in dirs_to_rev:
-      print "removing directory %s" % d
-      try:
-          system(["git", "rm", "-r", d], cwd=dest_dir)
-      except subprocess.CalledProcessError:
-          print "Could not remove %s" % d
-      print "cloning directory %s" % d
-      files = system(["git", "ls-files", d], cwd=source_dir)
-      for f in files.splitlines():
-          source_path = os.path.join(source_dir, f)
-          if not os.path.isfile(source_path):
-              continue
-          dest_path = os.path.join(dest_dir, f)
-          system(["mkdir", "-p", os.path.dirname(dest_path)], cwd=source_dir)
-          system(["cp", source_path, dest_path], cwd=source_dir)
-      system(["git", "add", d], cwd=dest_dir)
-
-    for f in files_not_to_roll:
-        system(["git", "checkout", "HEAD", f], cwd=dest_dir)
-
-    system(["git", "add", "."], cwd=dest_dir)
-    src_commit = system(["git", "rev-parse", "HEAD"], cwd=source_dir).strip()
-    commit("Update to %s %s" % (name, src_commit), cwd=dest_dir)
-
-
-def main():
-  parser = argparse.ArgumentParser(description="Update the mojo repo's " +
-      "snapshot of things imported from chromium.")
-  parser.add_argument("--mojo-dir", type=str)
-  parser.add_argument("--chromium-dir", type=str)
-  parser.add_argument("--dest-dir", type=str)
-
-  args = parser.parse_args()
-
-  if args.mojo_dir:
-      rev(args.mojo_dir, args.dest_dir, dirs_from_mojo, 'mojo')
-
-  if args.chromium_dir:
-      rev(args.chromium_dir, args.dest_dir, dirs_from_chromium, 'chromium')
-
-      try:
-          patch.patch_and_filter(args.dest_dir)
-      except subprocess.CalledProcessError:
-          print "ERROR: Roll failed due to a patch not applying"
-          print "Fix the patch to apply, commit the result, and re-run this script"
-          return 1
-
-  return 0
-
-
-if __name__ == "__main__":
-  sys.exit(main())