diff --git a/scripts/AppVeyor/mtime_cache b/scripts/AppVeyor/mtime_cache
deleted file mode 100644
index e296e3658..000000000
--- a/scripts/AppVeyor/mtime_cache
+++ /dev/null
@@ -1,177 +0,0 @@
-#!/usr/bin/env ruby
-
-#
-# mtime_cache
-# Copyright (c) 2016 Borislav Stanimirov
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to
-# deal in the Software without restriction, including without limitation the
-# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
-# sell copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
-# IN THE SOFTWARE.
-#
-
-require 'digest/md5'
-require 'json'
-require 'fileutils'
-
-VERSION = "1.0.2"
-
-VERSION_TEXT = "mtime_cache v#{VERSION}"
-
-USAGE = <<ENDUSAGE
-
-Usage:
-    mtime_cache [<globs>] [-g globfile] [-d] [-q|V] [-c cache]
-ENDUSAGE
-
-HELP = <<ENDHELP
-
-    Traverse through globbed files, making a json cache based on their mtime.
-    If a cache exists, changes the mtime of existing unchanged (based on MD5
-    hash) files to the one in the cache.
-
-    Options:
-
-    globs           Ruby-compatible glob strings (ex some/path/**/*.java)
-                    A extension pattern is allowd in the form %{pattern}
-                    (ex some/path/*.{%{pattern1},%{pattern2}})
-                    The globs support the following patterns:
-                     %{cpp} - common C++ extensions
-
-    -g, --globfile  A file with list of globs to perform (one per line)
-
-    -?, -h, --help  Show this help message.
-    -v, --version   Show the version number (#{VERSION})
-    -q, --quiet     Don't log anything to stdout
-    -V, --verbose   Show extra logging
-    -d, --dryrun    Don't change any files on the filesystem
-    -c, --cache     Specify the cache file for input and output.
-                    [Default is .mtime_cache.json]
-
-ENDHELP
-
-param_arg = nil
-ARGS = { :cache => '.mtime_cache.json', :globs => [] }
-
-ARGV.each do |arg|
-  case arg
-    when '-g', '--globfile'   then param_arg = :globfile
-    when '-h', '-?', '--help' then ARGS[:help] = true
-    when '-v', '--version'    then ARGS[:ver] = true
-    when '-q', '--quiet'      then ARGS[:quiet] = true
-    when '-V', '--verbose'    then ARGS[:verbose] = true
-    when '-d', '--dryrun'     then ARGS[:dry] = true
-    when '-c', '--cache'      then param_arg = :cache
-    else
-      if param_arg
-        ARGS[param_arg] = arg
-        param_arg = nil
-      else
-        ARGS[:globs] << arg
-      end
-  end
-end
-
-def log(text, level = 0)
-  return if ARGS[:quiet]
-  return if level > 0 && !ARGS[:verbose]
-  puts text
-end
-
-if ARGS[:ver] || ARGS[:help]
-  log VERSION_TEXT
-  exit if ARGS[:ver]
-  log USAGE
-  log HELP
-  exit
-end
-
-if ARGS[:globs].empty? && !ARGS[:globfile]
-  log 'Error: Missing globs'
-  log USAGE
-  exit 1
-end
-
-EXTENSION_PATTERNS = {
-  :cpp => "c,cc,cpp,cxx,h,hpp,hxx,inl,ipp,inc,ixx"
-}
-
-cache_file = ARGS[:cache]
-
-cache = {}
-
-if File.file?(cache_file)
-  log "Found #{cache_file}"
-  cache = JSON.parse(File.read(cache_file))
-  log "Read #{cache.length} entries"
-else
-  log "#{cache_file} not found. A new one will be created"
-end
-
-globs = ARGS[:globs].map { |g| g % EXTENSION_PATTERNS }
-
-globfile = ARGS[:globfile]
-if globfile
-  File.open(globfile, 'r').each_line do |line|
-    line.strip!
-    next if line.empty?
-    globs << line % EXTENSION_PATTERNS
-  end
-end
-
-if globs.empty?
-  log 'Error: No globs in globfile'
-  log USAGE
-  exit 1
-end
-
-files = {}
-num_changed = 0
-
-globs.each do |glob|
-  Dir[glob].each do |file|
-    next if !File.file?(file)
-
-    mtime = File.mtime(file).to_i
-    hash = Digest::MD5.hexdigest(File.read(file))
-
-    cached = cache[file]
-
-    if cached && cached['hash'] == hash && cached['mtime'] < mtime
-      mtime = cached['mtime']
-
-      log "mtime_cache: changing mtime of #{file} to #{mtime}", 1
-
-      File.utime(File.atime(file), Time.at(mtime), file) if !ARGS[:dry]
-      num_changed += 1
-    else
-      log "mtime_cache: NOT changing mtime of #{file}", 1
-    end
-
-    files[file] = { 'mtime' => mtime, 'hash' => hash }
-  end
-end
-
-log "Changed mtime of #{num_changed} of #{files.length} files"
-log "Writing #{cache_file}"
-
-if !ARGS[:dry]
-  dirname = File.dirname(cache_file)
-  unless File.directory?(dirname)
-    FileUtils.mkdir_p(dirname)
-  end
-  File.open(cache_file, 'w').write(JSON.pretty_generate(files))
-end