removing the need for panic and _start snippets in user space binaries

system/drivers/virtio-gpu/virtio-gpu.zig

@@ -615,8 +615,3 @@ pub fn main(init: runtime.process.Init) void {
         .on_message = onMessage,
     });
 }
-
-pub const panic = runtime.panic;
-comptime {
-    _ = &runtime.start._start; // pull the runtime entry shim into the image
-}