ci/papr: Drop insttests
ci/papr: Drop insttests

This didn't quite work out, and is now always failing because Ansible
changed.

For now we have some OK coverage via the rpm-ostree suite, let's just
drop this and revisit later.

Closes: #1783
Approved by: jlebon

GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree