Remove "asc" function

Used GNU screen. Probably users switched to tmux and/or mosh.

Gbp-Dch: full
Closes: #230

Author: zeha

doc/grmlzshrc.adoc

@@ -641,12 +641,6 @@ If no argument is specified N is set to 1.
 *any()*::
 Lists processes matching given pattern.
 
-*asc()*::
-Login on the host provided as argument using autossh. Then reattach a GNU screen
-session if a detached session is around or detach a currently attached screen or
-else start a new screen.  This is especially useful for roadwarriors using GNU
-screen and ssh.
-
 *bk()*::
 Simple backup management of a file or directory using standard unix programs.
 The target file name is the original name plus a time stamp attached. Symlinks

etc/zsh/zshrc

@@ -2472,12 +2472,6 @@ if [[ -x /sbin/kexec ]] && [[ -r /proc/cmdline ]] ; then
     alias "$(uname -r)-reboot"="kexec -l --initrd=/boot/initrd.img-"$(uname -r)" --command-line=\"$(cat /proc/cmdline)\" /boot/vmlinuz-"$(uname -r)""
 fi
 
-# especially for roadwarriors using GNU screen and ssh:
-if ! check_com -g asc && check_com -c autossh && check_com -c screen &>/dev/null ; then
-  function asc () { autossh -t "$@" 'screen -RdU' }
-  compdef asc=ssh
-fi
-
 #f1# Hints for the use of zsh on grml
 function zsh-help () {
     print "$bg[white]$fg[black]