See https://lists.debian.org/debian-haskell/2018/12/msg00000.html

Apply change to 39 packages, using:

  $ dht mass-change "Remove Dmitry Bogatov from Uploaders per his request. Thank you Dmitry for your previous maintainership." 'sed -i -e "s/Dmitry Bogatov <KAction@gnu.org>/Ilias Tsitsimpis <iliastsi@debian.org>/" debian/control' p/*