Since there are no scripts to compile in Unity, the editor gives a warning each time the project recompiles.

It would be great to remove this message, by simply removing the redundant .asmdef file in the package.

Assembly for Assembly Definition File 'Packages/com.pusher.pusherwebsocketunity/PusherWebsocketUnity.asmdef' will not be compiled, because it has no scripts associated with it.