Delete cros-gunzip-dd.py because it reboots the machine anyway

cros-gunzip-dd.py

-#!/usr/bin/env python2
-# -*- coding: utf-8 -*-
-"""
-  Usage: cros-gunzip-dd.py SRC.gz DEST
-
-  It's a shortcut for `zcat SRC.gz | dd of=DEST`. Useful on nayuos because the
-  "dd" command may crash. Unlike "dd", this script does not writing
-  synchronously, you may want to wait for cache to be emptied after the copy.
-  You can still force your system to empty its caches by using `sync` command.
-"""
-import sys, gzip
-src = gzip.open(sys.argv[1], "rb")
-dst = open(sys.argv[2], "wb")
-while True:
-  buf = src.read(512)
-  if len(buf) == 0:
-    break
-  dst.write(buf)