I havent heard of any benefit to removing things in advance. I think that once you have been through radiation and/or chemo the best thing is to leave well enough alone. Any such procedure will leave an opening in your body's defenses, from my point of view.
I had teeth removed because they didnt want any possible extractions after I had started treatment just for that reason.
I think you are best off recovering as quickly as possible from your cancer and treatment and keeping yourself as healthy as possible.
Best wishes,
Mike