Remove the possibility to skip install scripts and related commands

[alquerci]

There are no possibility to skip install scripts for apt-get, dpkg and also for the cygwin setup.exe: http://pwet.fr/man/linux/administration_systeme/apt_get http://pwet.fr/man/linux/commandes/dpkg https://cygwin.com/faq.html#faq.setup.cli

https://github.com/nylen/cyg-apt/pull/13#issuecomment-51651248