Comment 3 for bug 1894919

To double check my logic I ran an upgrade of a stock Ubuntu desktop system from bionic to focal and immediately after the upgrade ran 'sudo apt-get autoremove'. The list of packages marked for removal are the same as the ones the release-upgrader suggested with my change.

bdmurray@clean-bionic-amd64:/tmp/ubuntu-release-upgrader-idl254bt$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS"
bdmurray@clean-bionic-amd64:/tmp/ubuntu-release-upgrader-idl254bt$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  command-not-found-data diffstat gnome-software-common gsfonts guile-2.0-libs libalgorithm-diff-perl libalgorithm-merge-perl
  libappstream-glib8 libarchive-zip-perl libboost-filesystem1.65.1 libboost-system1.65.1 libcgi-pm-perl libclass-method-modifiers-perl
  libclass-xsaccessor-perl libclone-perl libcommon-sense-perl libcrypt-dev libdigest-bubblebabble-perl libenchant1c2a libexempi3
  libexiv2-14 libfftw3-double3 libgmime-3.0-0 libgtksourceview-3.0-common libgweather-3-15 libindicator3-7 libip4tc0 libip6tc0 libitm1
  libjson-xs-perl liblouis14 liblouisutdml8 liblwres160 libnet-domain-tld-perl libnetpbm10 liboauth0 libprotobuf10 libpython2.7-minimal
  libpython2.7-stdlib libraw16 libref-util-perl libref-util-xs-perl libreoffice-avmedia-backend-gstreamer libreoffice-style-galaxy
  librole-tiny-perl libssl1.0.0 libsub-quote-perl libtest-refcount-perl libtypes-serialiser-perl libunicode-utf8-perl
  linux-hwe-5.4-headers-5.4.0-45 linux-hwe-5.4-headers-5.4.0-47 linux-libc-dev manpages-dev python3-asn1crypto python3-oauth
  python3-simplegeneric python3-zope.interface qpdf xserver-xorg-input-all-hwe-18.04 xserver-xorg-legacy-hwe-18.04
  xserver-xorg-video-ati-hwe-18.04 xserver-xorg-video-fbdev-hwe-18.04 xserver-xorg-video-qxl-hwe-18.04 xserver-xorg-video-radeon-hwe-18.04
  xserver-xorg-video-vesa-hwe-18.04
0 upgraded, 0 newly installed, 66 to remove and 0 not upgraded.
After this operation, 214 MB disk space will be freed.