net/templates/run.sh: drop 'fg'

This was related to attempting to fix the infinite "q Enter to close"
msgs bug, which has been properly fixed in
Iebb799493f76fd57f24b15c998ded2bd8e284e6b.

Remove fg to get rid of this error:
  zsh:fg:1: no job control in this shell.

Change-Id: Iba7a1adbc4f48b0477a53590ffec8af518fdf467

net/templates/run.sh

@@ -128,7 +128,7 @@ EOF
 
   case "$terminal" in
     tmux)
-      tmux new-window -d -n "$title" "$launcher &; echo \$! > $pidfile_term; fg; wait"
+      tmux new-window -d -n "$title" "$launcher &; echo \$! > $pidfile_term; wait"
       ;;
     *)
       $terminal \