Simplify tmux auto start code

that was probably actually important, and I'll regret it later

.zshrc

@@ -43,18 +43,12 @@ unalias run-help
 autoload run-help
 
 # Auto start tmux if a remote connection
-if [[ -z "$TMUX" && -z "$EMACS" && -z "$VIM" ]] && [[ -n "$SSH_TTY" ]]
+if [[ -z "$TMUX" && -z "$EMACS" && -z "$VIM" && -n "$SSH_TTY" ]]
 then
-  tmux_session='zim'
-  tmux start-server
-  # Create a 'prezto' session if no session has been defined in tmux.conf.
-  if ! tmux has-session 2> /dev/null; then
-    tmux \
-      new-session -d -s "$tmux_session" \; \
-      set-option -t "$tmux_session" destroy-unattached off &> /dev/null
+  # Attach only to the 'auto' session
+  exec tmux new-session -A -s 'auto'
 fi
 
-  # Attach only to the prezto session
-  exec tmux new-session -A -s $tmux_session
   fi
 
+