Remove legacy zsh startup files

dotfiles/zshenv

@@ -1 +0,0 @@
-

dotfiles/zshrc

@@ -1,27 +0,0 @@
-# This is necessary for tramp.
-[[ $TERM == "dumb" ]] && unsetopt zle && PS1='$ ' && return
-
-source_if_exists ~/.custom.sh
-source_if_exists ~/.this-machine.sh
-
-function emacs_ansi_term_support {
-    echo -e "\033AnSiTu" "$LOGNAME" # $LOGNAME is more portable than using whoami.
-    echo -e "\033AnSiTc" "$(pwd)"
-    if [ $(uname) = "SunOS" ]; then
-	    # The -f option does something else on SunOS and is not needed anyway.
-       	hostname_options="";
-    else
-        hostname_options="-f";
-    fi
-	# XXX/TODO: This disables correct setting of the current directory
-    # when in an sshed shell when inside of emacs
-	# echo -e "\033AnSiTh" "$(hostname $hostname_options)" # Using the -f option can #
-    # cause problems on some OSes.
-}
-
-if environment_variable_exists INSIDE_EMACS; then
-	if [[ $INSIDE_EMACS == *"term"* ]]
-	then
-		add-zsh-hook precmd emacs_ansi_term_support
-	fi
-fi