Drop obsolete xinitrc

* xinitrc: Drop obsolete file.
* exwm.el: Update commentary.

Author: minad

exwm.el

@@ -52,7 +52,10 @@
 ;;    (setq exwm-input-global-keys `(([?\s-r] . exwm-reset)))
 ;;    (exwm-enable)
 ;;
-;; 3. Link or copy the file 'xinitrc' to '~/.xinitrc'.
+;; 3. Add the following lines to '~/.xinitrc':
+;;
+;;    exec emacs
+;;
 ;; 4. Launch EXWM in a console (e.g. tty1) with
 ;;
 ;;    xinit -- vt01