mqueue doesn't need make_bad_inode()

It never hashes them anyway and does final iput() immediately
afterwards.  With ->drop_inode() being generic_delete_inode()...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ipc/mqueue.c

@@ -176,7 +176,6 @@ static struct inode *mqueue_get_inode(struct super_block *sb,
 	}
 	return inode;
 out_inode:
-	make_bad_inode(inode);
 	iput(inode);
 	return NULL;
 }