Stop messing with my ticket. This is NOT your ticket and just because you disagree with solution doesn't mean you have right to change it. That's developer's job.
...and that is a bug that should be fixed.
You don't understand what is and what isn't a bug. Not following recommendation is not a bug. Inconsistent layout in browsers is a bug.
In this case removing underline is a better solution because abbreviation in footer is irrelevant, regardless of recommendations. Time zone abbreviation is irrelevant. Forum visitors are interested in forum content, not links in footer. Underlining abbreviation in footer changes layout of that element to stand out from the rest, which makes footer a bit uglier.
Thank you, phpBB.com user #5926, for the nice reply to another contributor!
You seem to not understand your place. You are not developer, you are not team member, you are not person who created ticket, you are just random person who disagrees with something. Everyone is entitled to their opinions. That doesn't give you right to mess with this ticket. Its up to developers to decide what they want to do, not to you. You are just an idiot who blindly follows someone else's recommendations without thinking for himself.