cirrus: delete FreeBSD and macOS jobs

cirrus: delete FreeBSD and macOS jobs

The builds for these two platforms can now be performed from GitLab CI
using cirrus-run.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Message-Id: <20210625172211.451010-4-berrange@redhat.com>
Message-Id: <20210709143005.1554-9-alex.bennee@linaro.org>