20-keyboard.conf: remove: keyboard is configured by xinitrc

conf/20-keyboard.conf

@@ -1,9 +0,0 @@
-# ln -s this /etc/X11/xorg.conf.d
-
-Section "InputClass"
-    Identifier             "Keyboard Defaults"
-    MatchIsKeyboard        "yes"
-#    Option                 "XkbModel" "acer_laptop"
-    Option                 "XkbLayout" "jp"
-    Option                 "XkbOptions" "ctrl:nocaps,ctrl:menu_rctrl"
-EndSection