[zsh] Remove useless and time consuming Debian related aliases

.zsh/config/50_debian.zsh

@@ -17,8 +17,6 @@ alias agi="sudo apt-get install"
 alias au="sudo apt-get update"
 alias aug="sudo apt-get update && sudo apt-get upgrade"
 alias dbuild="time debuild -eDEB_BUILD_OPTIONS='parallel=9' -i -us -uc --lintian-opts --color=always -IE --pedantic"
-alias apt-show-obsolete="aptitude search '?obsolete'"
-alias apt-purge-obsolete="apt-get --purge remove $(aptitude search '?obsolete' -F '%p' | xargs)"
 
 apt-rbdepends() {
     grep-dctrl -F Build-Depends "$1" -s Package /var/lib/apt/lists/*_Sources