devpts_pty_kill(): don't bother with d_delete()

we are not retaining dentries there anyway (simple_dentry_operations),
so d_delete()+dput() == d_drop()+dput()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/devpts/inode.c

@@ -622,7 +622,7 @@ void devpts_pty_kill(struct dentry *dentry)
 	dentry->d_fsdata = NULL;
 	drop_nlink(dentry->d_inode);
 	fsnotify_unlink(d_inode(dentry->d_parent), dentry);
-	d_delete(dentry);
+	d_drop(dentry);
 	dput(dentry);	/* d_alloc_name() in devpts_pty_new() */
 }