Remove support for older RR test double framework versions
Created by: pirj
This is due to this rearrangement: https://github.com/rr/rr/commit/65a29643515575bbde9686c5ccade87f7b2a73df#diff-6aad5729c760c1d242cb39250fe9c9e57a15753e3a347a8413520b3415454e42R56