Remove 'n' keybindings for keyboard switching (keep code-57)

Code 57 normally means N, so this layout started (rightfully, I admit)
generating conflict errors.  Assigning key is probably more reliable,
though, so we'll keeo that one.

dotfiles/i3/config

 
 bindsym $mod+t              exec "acclive"
 
-bindsym $mod+n              exec "bmo kb next"
-bindsym $mod+Shift+n        exec "bmo kb home"
+# Note: 57 translates to 'N' so these are basically $mod+n abd $mod+Shift+n
 bindcode $mod+57            exec "bmo kb next"
 bindcode $mod+Shift+57      exec "bmo kb home"