Unless things have changed a lot in the last couple years, Calibre doesn't do anything with stripping DRM and actually tries to stay away from it. It's possible that there are plug-ins to do it, but if the Calibre devs curate the plug-ins I wouldn't expect to find those either.
Calibre is an ebook library manager. It's clunky in some ways, but I'm not sure what better options exist.