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.

src/factory.cpp

@@ -178,10 +178,10 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name,
       return new waybar::modules::Sndio(id, config_[name]);
     }
 #endif
-#ifdef HAVE_GIO_UNIX
     if (ref == "bluetooth") {
       return new waybar::modules::Bluetooth(id, config_[name]);
     }
+#ifdef HAVE_LOGIND_INHIBITOR
     if (ref == "inhibitor") {
       return new waybar::modules::Inhibitor(id, bar_, config_[name]);
     }