Resolution: Won't Fix
Affects Version/s: 7.0.X, 7.1.X, Master
Fix Version/s: None
Component/s: Frontend Infrastructure
Steps to verify:
Open https://validator.w3.org and validate www.liferay.com
It is worth to mention that this task is just the opposite of the https://issues.liferay.com/browse/LPS-63977 task, which has been done in the past.