diff --git a/lib/monkey_patching_fileutils.rb b/lib/monkey_patching_fileutils.rb
deleted file mode 100644
index ef562433e..000000000
--- a/lib/monkey_patching_fileutils.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-# ref. https://github.com/docker/for-linux/issues/1015#issuecomment-811453779
-module FileUtilsDockerPatch
-  def copy_file(dest)
-    FileUtils.touch(path)
-    super
-  end
-end
-
-module FileUtils
-  class Entry_ # rubocop:disable Naming/ClassAndModuleCamelCase
-    prepend FileUtilsDockerPatch
-  end
-end