             systemName: "music.note", action: #selector(didTapLibraryButton), style: .body)
         let cloudButton = createButton(
             systemName: "icloud.fill", action: #selector(didTapCloudButton), style: .body)
-        listButton = createButton(
-            systemName: "list.dash", action: #selector(didTapListButton), style: .body)
 
         let routePickerView = AVRoutePickerView()
         let volumeSlider = MPVolumeView()

        mediaController.nextTrack()
    }

    @objc private func didTapListButton() {
        let viewController = UIViewController()
        viewController.view.backgroundColor = .systemBackground
        present(viewController, animated: true, completion: nil)
    }

    @objc private func didTapLibraryButton() {
        let picker = MPMediaPickerController(mediaTypes: .anyAudio)
        picker.delegate = self

        controlContentView.axis = .horizontal

        let optionsContentView = UIStackView(arrangedSubviews: [
            libraryButton, cloudButton, routePickerView
        ])
        optionsContentView.distribution = .equalCentering
        optionsContentView.alignment = .fill
