staging/lustre/ptlrpc: Remove log message about export timer update

Function ptlrpc_update_export_timer generates lots of D_HA level log
messages whenever the export timer gets updated. Those log messages
are found little use for issue investigations, and it will take space
in the Lustre log buffer. We are removing it now.

Xyratex-bug-id: MRP-733
Signed-off-by: NCheng Shao <cheng_shao@xyratex.com>
Reviewed-on: http://review.whamcloud.com/9147
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4590Reviewed-by: NAndreas Dilger <andreas.dilger@intel.com>
Signed-off-by: NOleg Drokin <oleg.drokin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/ptlrpc/service.c

@@ -1042,9 +1042,6 @@ static void ptlrpc_update_export_timer(struct obd_export *exp, long extra_delay)
 		return;
 
 	exp->exp_last_request_time = new_time;
-	CDEBUG(D_HA, "updating export %s at "CFS_TIME_T" exp %p\n",
-	       exp->exp_client_uuid.uuid,
-	       exp->exp_last_request_time, exp);
 
 	/* exports may get disconnected from the chain even though the
 	   export has references, so we must keep the spin lock while