package/xlib_libX11: remove unrecognized option

Remove --with-xcb as this option has been removed since version 1.3.99:
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=15e5eaf62897b3179d1fbe457cb19f886f0449f8

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/x11r7/xlib_libX11/xlib_libX11.mk

@@ -30,7 +30,6 @@ HOST_XLIB_LIBX11_DEPENDENCIES = \
 
 XLIB_LIBX11_CONF_OPTS = \
 	--disable-malloc0returnsnull \
-	--with-xcb \
 	--disable-specs \
 	--without-perl