oeqa/utils/commands: remove unused imports

(From OE-Core rev: 9faa5ad7ea61a2edd121b526c688f964e0b656ac)

Signed-off-by: Enrico Jorns <ejo@pengutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 0c00b5cdd57c3d9c47d4780d6627c74221911b72)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/lib/oeqa/utils/commands.py

@@ -8,11 +8,8 @@
 # This module is mainly used by scripts/oe-selftest and modules under meta/oeqa/selftest
 # It provides a class and methods for running commands on the host in a convienent way for tests.
 
-
-
 import os
 import sys
-import signal
 import subprocess
 import threading
 import time