Cleanup: remove unused bindings and comments

dotfiles/i3/config

 # Use Mouse+$mod to drag floating windows to their wanted position
 floating_modifier $mod
 
-# kill focused window
-bindsym $mod+Shift+q        kill
-
-# start dmenu (a program launcher)
-# There also is the (new) i3-dmenu-desktop which only displays applications
-# shipping a .desktop file. It is a wrapper around dmenu, so you need that
-# installed.
-
 # change focus
 bindsym $mod+h              focus left
 bindsym $mod+j              focus down
   bindsym Return mode "default"
 }
 
+
 # reload the configuration file
 #bindsym $mod+Shift+c reload
 # restart i3 inplace (preserves your layout/session, can be used to upgrade i3)
 bindsym $mod+Shift+r restart
-# exit i3 (logs you out of your X session)
-bindsym $mod+Shift+e exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -b 'Yes, exit' 'i3-msg exit'"
 
 
 bindsym $mod+r mode "resize"