Don't try to install kali-linux-light in the light variant

The package has no purpose and will be dropped. Light is just
a simple desktop with kali-linux-core and no tools.

kali-config/variant-light/package-lists/kali.list.chroot

@@ -1,13 +1,10 @@
 # You always want those
-#kali-linux-core
+kali-linux-core
 kali-desktop-live
 
 # Kali applications
-#<package>
 # You can customize the set of Kali metapackages (groups of tools) to install
 # For the complete list see: https://tools.kali.org/kali-metapackages
-kali-linux-light
-# kali-tools-top10
 
 # Graphical desktop
 kali-desktop-xfce