impriving architecture

src/vulkan/PhysicalDevice.zig

@@ -1,14 +1,8 @@
 const vk = @import("vulkan");
-const Instance = @import("Instance.zig").Instance;
-const Object = @import("object.zig").Object;
+const Instance = @import("Instance.zig");
 
-pub const PhysicalDevice = extern struct {
-    const Self = @This();
-    const ObjectType: vk.ObjectType = .physical_device;
+const Self = @This();
+const ObjectType: vk.ObjectType = .physical_device;
 
-    object: Object,
-
-    instance: *Instance,
-    props: vk.PhysicalDeviceProperties,
-    queue_families: [3]vk.QueueFamilyProperties,
-};
+props: vk.PhysicalDeviceProperties,
+queue_families: [3]vk.QueueFamilyProperties,