jbd2: remove always true condition in __journal_try_to_free_buffer()

The check b_jlist == BJ_None in __journal_try_to_free_buffer() is
always true (__jbd2_journal_temp_unlink_buffer() also checks this in
an assertion) so just remove it.
Signed-off-by: NJan Kara <jack@suse.cz>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/jbd2/transaction.c

@@ -1676,10 +1676,8 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
 	spin_lock(&journal->j_list_lock);
 	if (jh->b_cp_transaction != NULL && jh->b_transaction == NULL) {
 		/* written-back checkpointed metadata buffer */
-		if (jh->b_jlist == BJ_None) {
-			JBUFFER_TRACE(jh, "remove from checkpoint list");
-			__jbd2_journal_remove_checkpoint(jh);
-		}
+		JBUFFER_TRACE(jh, "remove from checkpoint list");
+		__jbd2_journal_remove_checkpoint(jh);
 	}
 	spin_unlock(&journal->j_list_lock);
 out: