ubuntu-unity-live task exists, use it also instead of hard-coded list of packages.

debian/changelog

@@ -6,6 +6,8 @@ livecd-rootfs (23.10.33) UNRELEASED; urgency=medium
   * Don't hard-code addition of xterm package on xubuntu, it's in the task
     already.
   * Drop references to ubuntu-netbook, obsolete since Ubuntu 11.04.
+  * ubuntu-unity-live task exists, use it also instead of hard-coded list of
+    packages.
 
  -- Steve Langasek <steve.langasek@ubuntu.com>  Wed, 06 Sep 2023 11:23:17 -0700
 

live-build/auto/config

@@ -896,13 +896,7 @@ case $PROJECT in
 
 	ubuntu-unity)
 		add_task install minimal standard ubuntu-unity-desktop
-		# XXX: Adding live packages manually temporarily until we have
-		#  the live task for ubuntu-unity set up properly.
-		add_package live metacity ubiquity-frontend-gtk
-		add_package live ubiquity-ubuntu-artwork ubiquity-slideshow-ubuntu
-		add_package live a11y-profile-manager
-		add_package live gparted cifs-utils
-		add_package live memtest86+
+		LIVE_TASK=ubuntu-unity-live
 		;;
 
 	ubuntustudio-dvd)