do_compact_page() will do list_del_init(&zhdr->buddy) for us.  Remove this
extra one to save some possible cpu cycles.

Link: https://lkml.kernel.org/r/20220308134311.59086-8-linmiaohe@huawei.comSigned-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>