[GFS2] Don't periodically update the jindex

We only care about the content of the jindex in two cases,
one is when we mount the fs and the other is when we need
to recover another journal. In both cases we have to update
the jindex anyway, so there is no point in updating it
periodically between times, so this removes it to simplify
gfs2_logd.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/incore.h

@@ -411,7 +411,6 @@ struct gfs2_tune {
 	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
 	unsigned int gt_incore_log_blocks;
 	unsigned int gt_log_flush_secs;
-	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
 
 	unsigned int gt_recoverd_secs;
 	unsigned int gt_logd_secs;