vimrc: remove extempore; zshrc: better clipboard clearing mechanism

zshrc

@@ -59,7 +59,7 @@ alias emptytrash="sudo rm -rfv /Volumes/*/.Trashes; sudo rm -rfv ~/.Trash; sudo
 alias loc="cloc --read-lang-def=/Users/veitheller/.scripts/cloc.txt *"
 alias ls="ls -a"
 alias quit="exit"
-alias clipboard_clear="echo lol | pbcopy"
+alias pbclear="echo -n '' | pbcopy"
 PROMPT="%{$fg[red]%}%n%{$fg[white]%} at %{$fg[green]%}%m%{$fg[white]%}"$'\n'"=> "
 
 expand-or-complete-with-dots(){