Update: Elon was asked about these in a Twitter Space, he says it's not appropriate and will be removed from the codebase.
Additionally, from another Twitter engineer, the Democrat/Republican flags are apparently 10 years old and not important and do not have high feature importance.
I think the decade old comment related to a different part of the code regarding the number of followers you have in relation to the number of accounts you follow. (Everybody on the call wants to remove this: I wonder why they haven't yet.)
