jbd: drop jbd_ENOSYS debug

A quick search shows that there are no users, drop the
macro for both jbd and jbd2.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>

include/linux/jbd.h

@@ -956,15 +956,6 @@ void __log_wait_for_space(journal_t *journal);
 extern void	__journal_drop_transaction(journal_t *, transaction_t *);
 extern int	cleanup_journal_tail(journal_t *);
 
-/* Debugging code only: */
-
-#define jbd_ENOSYS() \
-do {								           \
-	printk (KERN_ERR "JBD unimplemented function %s\n", __func__); \
-	current->state = TASK_UNINTERRUPTIBLE;			           \
-	schedule();						           \
-} while (1)
-
 /*
  * is_journal_abort
  *

include/linux/jbd2.h

@@ -1251,15 +1251,6 @@ void __jbd2_log_wait_for_space(journal_t *journal);
 extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *);
 extern int jbd2_cleanup_journal_tail(journal_t *);
 
-/* Debugging code only: */
-
-#define jbd_ENOSYS() \
-do {								           \
-	printk (KERN_ERR "JBD unimplemented function %s\n", __func__); \
-	current->state = TASK_UNINTERRUPTIBLE;			           \
-	schedule();						           \
-} while (1)
-
 /*
  * is_journal_abort
  *