%tmpfiles macro nowadays is a noop since it is done via triggers in the systemd package. This warning is shown in every package even if they are using %tmpfiles_create %{_tmpfilesdir}/%{pkgname}.conf in %post.

For example the package matrix-synapse, uses the macro in %post but it gets the warning in the rpmlint output.

We should disable this check for openSUSE, and maybe consider to remove it completely if it's not relevant for other distributions.

The change in macros was done in the revision 102: https://build.opensuse.org/package/rdiff/Base:System/systemd-rpm-macros?linkrev=base&rev=102