- remove USE_AUTOTOOLS
As we want to use xz for extraction of port's distfiles,
it cannot depend on autoconf.
PR: ports/147280
Approved by: maintainer (private e-mail)
This is the last beta release before XZ Utils 5.0.0. No big changes
are planned before the first stable release.
XZ Utils is the official successor to LZMA Utils.
Feature safe: yes