While looking at Minerva several FIXMes were noticed relating to changes for cached HTML T259628, T198947 and a 2020 change (https://gerrit.wikimedia.org/r/c/mediawiki/skins/MinervaNeue/+/592741), all of which were done long
They serve no purpose, and should have been removed a long time ago. Let's do that now.
The FIXMES are in code relating to the header and footer including last modified bar. This ticket acts as a placeholder so the team is aware this change has occurred.