ZED/zfs-list-cacher.sh: don't exit on ignored event type

The zfs-list-cacher.sh script currently respects the event types
excluded from syslog(!) in ZED_SYSLOG_SUBCLASS_EXCLUDE.
This makes little sense on this single-purpose script and
silently breaks when history_event are excluded from syslog,
which is the default since 7d52b4e.

Closes openzfs#11164

Signed-off-by: InsanePrawn <insane.prawny@gmail.com>

cmd/zed/zed.d/history_event-zfs-list-cacher.sh.in

@@ -13,7 +13,6 @@ FSLIST="${FSLIST_DIR}/${ZEVENT_POOL}"
 [ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
 . "${ZED_ZEDLET_DIR}/zed-functions.sh"
 
-zed_exit_if_ignoring_this_event
 zed_check_cmd "${ZFS}" sort diff grep
 
 # If we are acting on a snapshot, we have nothing to do