Since we stopped A/B testing the new Impact module in T336203: Positive reinforcement: Deploy the new Impact module to all Wikipedias on all Wikipedias, we should start the process of dropping the support of the oldimpact Homepage variant, which includes dropping A/B testing itself and dropping the old Impact module code as well.
(note we're A/B testing the new Impact module, but for technical reasons, the treatment group is actually called oldimpact and is given the old Impact module in the code; hence the confusing title)
Checklist
- Confirm with @KStoller-WMF that we will not need the old Impact module in the future
- Drop the oldimpact homepage variant (makes the old Impact module class unused)
- Drop the old Impact related code
- Possibly rename NewImpact to just Impact, since the distinction makes no sense to keep