Misc: move gnome, more packages, remove alias

- Move gnome to manual for headless servers
- Add prusa-slicer and cmake to optional Ubuntu packages
- Remove deprecated sshd alias

auto/auto

@@ -15,10 +15,6 @@ cd vim
 ./vim
 cd ..
 
-cd gnome
-./gnome
-cd ..
-
 cd readline
 ./readline
 cd ..

setup/ubuntu-setup.md

@@ -13,7 +13,7 @@ Here's my personal Ubuntu 23.04 setup.  (Make sure to use Wayland on Nvidia!)
 	- `sudo apt install arp-scan asciinema bookworm foliate gimp gnome-firmware gnome-games
 	  gnome-nettool gnome-packagekit gnome-passwordsafe gnome-shell-pomodoro gnome-usage gthumb
 	  heif-gdk-pixbuf heif-thumbnailer mkvtoolnix-gui openjdk-17-jdk pulseeffectsqpdf ranger
-	  syncplay virtualbox-qt vlc audacity f3`
+	  syncplay virtualbox-qt vlc audacity f3 prusa-slicer cmake`
 - Remove all snaps:
 	- ```
 	  # if this command fails, do the following then try again:

system/sshd/sshd_config-rhel

@@ -4,8 +4,6 @@ Port 22
 PermitRootLogin no
 PubkeyAuthentication yes
 PasswordAuthentication no
-# deprecated alias:
-# ChallengeResponseAuthentication no
 KbdInteractiveAuthentication no
 AuthorizedKeysFile .ssh/authorized_keys
 UsePAM yes