Removed libsingular because it is no longer in the ubuntu repo

scripts/create_offline_repo.sh

@@ -2,7 +2,7 @@
 PKG_LIST="gufw pwgen inkscape gimp subversion git graphviz gnome \
 xubuntu-desktop fityk openssh-server linux-firmware-nonfree zsh zsh-doc lftp gddrescue liblapack-dev liblapack-doc \
 python-numpy python-simpy python-scipy python-matplotlib ipython gnuplot wxmaxima root-system bpython \
-postgresql dia haskell-platform default-jdk swi-prolog libntl0 libsingular-3-0-4-3 \
+postgresql dia haskell-platform default-jdk swi-prolog libntl0 \
 "
 
 DESTINATION="/cdrom"