build: require gio-unix-2.0 unconditionally

We already use it without checking (`<gio/gdesktopappinfo.h>` in
wlr/taskbar), it's a transitive dependency of GTK and it's always
available on Unix platforms.

include/factory.hpp

@@ -80,8 +80,8 @@
 #ifdef HAVE_LIBSNDIO
 #include "modules/sndio.hpp"
 #endif
-#ifdef HAVE_GIO_UNIX
 #include "modules/bluetooth.hpp"
+#ifdef HAVE_LOGIND_INHIBITOR
 #include "modules/inhibitor.hpp"
 #endif
 #ifdef HAVE_LIBJACK