Stop installing the Unifont fonts

In #15807 we stopped pretending to support every possible language.
Since ed7a35df we install Noto fonts
that cover the scripts for every language we currently support,
and render much better than Unifont.

config/chroot_local-packageslists/tails-common.list

@@ -55,7 +55,6 @@ gir1.2-webkit2-4.0
 python3-gi
 python3-pycountry
 python3-tz
-ttf-unifont
 
 ### Software