libweston: remove unused backend_init() arguments

Backends do not have access to command line elements nor weston_config
anymore. They use the backend-specific config APIs now.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Giulio Camuffo <giuliocamuffo@gmail.com>
diff --git a/src/compositor-wayland.c b/src/compositor-wayland.c
index fe8b082..5b802f5 100644
--- a/src/compositor-wayland.c
+++ b/src/compositor-wayland.c
@@ -2169,8 +2169,7 @@
 
 static struct wayland_backend *
 wayland_backend_create(struct weston_compositor *compositor,
-		       struct weston_wayland_backend_config *new_config,
-		       int *argc, char *argv[], struct weston_config *config)
+		       struct weston_wayland_backend_config *new_config)
 {
 	struct wayland_backend *b;
 	struct wl_event_loop *loop;
@@ -2278,8 +2277,7 @@
 }
 
 WL_EXPORT int
-backend_init(struct weston_compositor *compositor, int *argc, char *argv[],
-	     struct weston_config *config,
+backend_init(struct weston_compositor *compositor,
 	     struct weston_backend_config *config_base)
 {
 	struct wayland_backend *b;
@@ -2298,7 +2296,7 @@
 	config_init_to_defaults(&new_config);
 	memcpy(&new_config, config_base, config_base->struct_size);
 
-	b = wayland_backend_create(compositor, &new_config, argc, argv, config);
+	b = wayland_backend_create(compositor, &new_config);
 
 	if (!b)
 		return -1;