region: remove leftover description of resource_list
"resource_list" no longer exists for regions. Remove the last remaining description of what it does.
#include <wlr/types/wlr_region.h>
/*
- * Creates a new region resource with the provided new ID. If `resource_list` is
- * non-NULL, adds the region's resource to the list.
+ * Creates a new region resource with the provided new ID.
*/
struct wl_resource *region_create(struct wl_client *client,
uint32_t version, uint32_t id);
