jbd2: remove unnecessary NULL check before iput()

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/jbd2/journal.c

@@ -1714,7 +1714,6 @@ int jbd2_journal_destroy(journal_t *journal)
 
 	if (journal->j_proc_entry)
 		jbd2_stats_proc_exit(journal);
-	if (journal->j_inode)
 	iput(journal->j_inode);
 	if (journal->j_revoke)
 		jbd2_journal_destroy_revoke(journal);