Remove forgotten debugging code

dotfiles/bash/post.bashrc

@@ -113,7 +113,6 @@ __bashum__mkpc() {
 
 __bashum__mkhostid() {
     test -n "$SSH_CONNECTION" || return
-    echo "__bashum__mkhostid(): HOSTNAME='$HOSTNAME'" >&2
     echo "${HOSTNAME%%.*}:"
 }