Revert "loop/010, common/rc: drain udev events after test"

This reverts commit c4abaa2.

Link: #181
Signed-off-by: Yi Zhang <[email protected]>

Author: yizhanglinux

common/rc

@@ -544,15 +544,6 @@ _systemctl_stop() {
 	done
 }
 
-_drain_udev_events() {
-	if command -v systemctl &>/dev/null &&
-			systemctl is-active --quiet systemd-udevd; then
-		systemctl restart systemd-udevd.service
-	else
-		udevadm settle --timeout=900
-	fi
-}
-
 # Run the given command as NORMAL_USER
 _run_user() {
 	su "$NORMAL_USER" -c "$1"

tests/loop/010

@@ -78,11 +78,5 @@ test() {
 	if _dmesg_since_test_start | grep --quiet "$grep_str"; then
 		echo "Fail"
 	fi
-
-	# This test generates udev events faster than the rate at which udevd
-	# can process events. Drain udev events to prevent future test cases
-	# fail.
-	_drain_udev_events
-
 	echo "Test complete"
 }