Remove banches about Hahn-Banach on MCA's github?

[affeldt-aist]

There are two branches about Hahn-Banach on the github of MCA that are quite old (5-6 years):

https://github.com/math-comp/analysis/tree/mathcomp_master_hahnbanach

https://github.com/math-comp/analysis/tree/hahnbanach

Is it ok to remove them (now that Hahn-Banach has landed in master)? @mkerjean