vim: remove wrong 8-space tabs indent from python files

Probably all vim users can setup their desired indent in their vimrc by
themselfs.

Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>

test/crit-recode.py

@@ -1,6 +1,4 @@
 #!/usr/bin/env python
-# vim: noet ts=8 sw=8 sts=8
-
 import pycriu
 import sys
 import os

test/inhfd/tty.py

@@ -1,4 +1,3 @@
-# vim: noet ts=8 sw=8 sts=8
 import fcntl
 import os
 import pty

test/zdtm.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# vim: noet ts=8 sw=8 sts=8
 from __future__ import absolute_import, division, print_function, unicode_literals
 
 import argparse