hypfs: don't bother with d_delete()

If that's not the last reference, d_delete() will do d_drop().
If it is, dput() immediately after it will unhash the sucker
anyway, since ->d_delete() the method is always_delete_dentry().

IOW, there's no point trying to turn it into a negative hashed
dentry - it won't stick around anyway.  Just d_drop() it and be
done with that.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/s390/hypfs/inode.c

@@ -76,7 +76,7 @@ static void hypfs_remove(struct dentry *dentry)
 		else
 			simple_unlink(d_inode(parent), dentry);
 	}
-	d_delete(dentry);
+	d_drop(dentry);
 	dput(dentry);
 	inode_unlock(d_inode(parent));
 }