bcachefs: kill journal->preres_wait

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/journal.h

@@ -119,7 +119,6 @@ static inline void journal_wake(struct journal *j)
 {
 	wake_up(&j->wait);
 	closure_wake_up(&j->async_wait);
-	closure_wake_up(&j->preres_wait);
 }
 
 static inline struct journal_buf *journal_cur_buf(struct journal *j)

fs/bcachefs/journal_types.h

@@ -195,7 +195,6 @@ struct journal {
 	/* Used when waiting because the journal was full */
 	wait_queue_head_t	wait;
 	struct closure_waitlist	async_wait;
-	struct closure_waitlist	preres_wait;
 
 	struct closure		io;
 	struct delayed_work	write_work;