jbd2: remove excess descriptions for handle_s

Commit bf699327 ("jbd2: Use tracepoints for history file")
removed the members j_history, j_history_max and j_history_cur from struct
handle_s but the descriptions stayed lingering. Removing them.
Signed-off-by: NLuis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
Reviewed-by: NJan Kara <jack@suse.cz>

include/linux/jbd2.h

@@ -789,9 +789,6 @@ jbd2_time_diff(unsigned long start, unsigned long end)
  * @j_wbufsize: maximum number of buffer_heads allowed in j_wbuf, the
  *	number that will fit in j_blocksize
  * @j_last_sync_writer: most recent pid which did a synchronous write
- * @j_history: Buffer storing the transactions statistics history
- * @j_history_max: Maximum number of transactions in the statistics history
- * @j_history_cur: Current number of transactions in the statistics history
  * @j_history_lock: Protect the transactions statistics history
  * @j_proc_entry: procfs entry for the jbd statistics directory
  * @j_stats: Overall statistics