diff --git a/update_glslang_sources_khr.py b/update_glslang_sources_khr.py
deleted file mode 100755
index e7be66c..0000000
--- a/update_glslang_sources_khr.py
+++ /dev/null
@@ -1,149 +0,0 @@
-#!/usr/bin/env python
-
-# Copyright 2017 The Glslang Authors. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Get source files for Glslang and its dependencies from public repositories.
-"""
-
-from __future__ import print_function
-
-import argparse
-import json
-import distutils.dir_util
-import os.path
-import subprocess
-import sys
-
-KNOWN_GOOD_FILE = 'known_good_khr.json'
-
-# Maps a site name to its host URL.
-SITE_TO_HOST = { 'github' : 'https://github.com/',
-                 'gitlab' : 'git@gitlab.khronos.org:' }
-
-VERBOSE = True
-
-
-def command_output(cmd, directory, fail_ok=False):
-    """Runs a command in a directory and returns its standard output stream.
-
-    Captures the standard error stream.
-
-    Raises a RuntimeError if the command fails to launch or otherwise fails.
-    """
-    if VERBOSE:
-        print('In {d}: {cmd}'.format(d=directory, cmd=cmd))
-    p = subprocess.Popen(cmd,
-                         cwd=directory,
-                         stdout=subprocess.PIPE)
-    (stdout, _) = p.communicate()
-    if p.returncode != 0 and not fail_ok:
-        raise RuntimeError('Failed to run {} in {}'.format(cmd, directory))
-    if VERBOSE:
-        print(stdout)
-    return stdout
-
-
-def command_retval(cmd, directory):
-    """Runs a command in a directory and returns its return value.
-
-    Captures the standard error stream.
-    """
-    p = subprocess.Popen(cmd,
-                         cwd=directory,
-                         stdout=subprocess.PIPE)
-    (stdout, _) = p.communicate()
-    return p.returncode
-
-
-class GoodCommit(object):
-    """Represents a good commit for a repository."""
-
-    def __init__(self, json):
-        """Initializes this good commit object.
-
-        Args:
-        'json':  A fully populated JSON object describing the commit.
-        """
-        self._json = json
-        self.name = json['name']
-        self.site = json['site']
-        self.subrepo = json['subrepo']
-        self.subdir = json['subdir'] if ('subdir' in json) else '.'
-        self.commit = json['commit']
-
-    def GetUrl(self):
-        """Returns the URL for the repository."""
-        host = SITE_TO_HOST[self.site]
-        return '{host}{subrepo}'.format(
-                    host=host,
-                    subrepo=self.subrepo)
-
-    def AddRemote(self):
-        """Add the remote 'known-good' if it does not exist."""
-        print('Ignore "fatal" errors for missing known-good remote:')
-        if command_retval(['git', 'remote', 'show', 'known-good'], self.subdir) != 0:
-            command_output(['git', 'remote', 'add', 'known-good', self.GetUrl()], self.subdir)
-
-    def HasCommit(self):
-        """Check if the repository contains the known-good commit."""
-        return 0 == subprocess.call(['git', 'rev-parse', '--verify', '--quiet',
-                                     self.commit + "^{commit}"],
-                                    cwd=self.subdir)
-
-    def Clone(self):
-        distutils.dir_util.mkpath(self.subdir)
-        command_output(['git', 'clone', self.GetUrl(), '.'], self.subdir)
-
-    def Fetch(self):
-        command_output(['git', 'fetch', 'known-good'], self.subdir)
-
-    def Checkout(self):
-        if not os.path.exists(os.path.join(self.subdir,'.git')):
-            self.Clone()
-        self.AddRemote()
-        if not self.HasCommit():
-            self.Fetch()
-        command_output(['git', 'checkout', self.commit], self.subdir)
-
-
-def GetGoodCommits():
-    """Returns the latest list of GoodCommit objects."""
-    with open(KNOWN_GOOD_FILE) as known_good:
-        return [GoodCommit(c) for c in json.loads(known_good.read())['commits']]
-
-
-def main():
-    parser = argparse.ArgumentParser(description='Get Glslang source dependencies at a known-good commit')
-    parser.add_argument('--dir', dest='dir', default='.',
-                        help="Set target directory for Glslang source root. Default is \'.\'.")
-
-    args = parser.parse_args()
-
-    commits = GetGoodCommits()
-
-    distutils.dir_util.mkpath(args.dir)
-    print('Change directory to {d}'.format(d=args.dir))
-    os.chdir(args.dir)
-
-    # Create the subdirectories in sorted order so that parent git repositories
-    # are created first.
-    for c in sorted(commits, key=lambda x: x.subdir):
-        print('Get {n}\n'.format(n=c.name))
-        c.Checkout()
-    sys.exit(0)
-
-
-if __name__ == '__main__':
-    main()