Remove support for handling SPA calls within the app. (#5515)

* Remove support for handling SPA call links.

They were a stop-gap solution whilst we were building support for embedded room calling.

* Simplify ElementCallConfiguration now that there is only 1 type of call to handle.

* Remove the unused overlayModule from NavigationRoomCoordinator.

ElementX/Sources/Application/AppCoordinator.swift

@@ -274,12 +274,6 @@ class AppCoordinator: AppCoordinatorProtocol, AuthenticationFlowCoordinatorDeleg
             case .accountProvisioningLink:
                 handleAppRoute(route,
                                windowType: windowType)
-            case .genericCallLink(let url):
-                if let userSessionFlowCoordinator {
-                    userSessionFlowCoordinator.handleAppRoute(route, animated: true)
-                } else {
-                    presentCallScreen(genericCallLink: url)
-                }
             case .userProfile(let userID):
                 if isExternalURL {
                     handleAppRoute(route,
@@ -878,35 +872,6 @@ class AppCoordinator: AppCoordinatorProtocol, AuthenticationFlowCoordinatorDeleg
         
         elementCallService.setClientProxy(userSession.clientProxy)
     }
-    
-    private func presentCallScreen(genericCallLink url: URL) {
-        let configuration = ElementCallConfiguration(genericCallLink: url)
-        
-        let callScreenCoordinator = CallScreenCoordinator(parameters: .init(elementCallService: elementCallService,
-                                                                            configuration: configuration,
-                                                                            allowPictureInPicture: false,
-                                                                            appSettings: appSettings,
-                                                                            appHooks: appHooks,
-                                                                            analytics: ServiceLocator.shared.analytics))
-        
-        callScreenCoordinator.actions
-            .sink { [weak self] action in
-                guard let self else { return }
-                switch action {
-                case .pictureInPictureIsAvailable:
-                    break
-                case .pictureInPictureStarted, .pictureInPictureStopped:
-                    // Don't allow PiP when signed out - the user could login at which point we'd
-                    // need to hand over the call from here to the user session flow coordinator.
-                    MXLog.error("Picture in Picture not supported before login.")
-                case .dismiss:
-                    navigationRootCoordinator.setOverlayCoordinator(nil)
-                }
-            }
-            .store(in: &cancellables)
-        
-        navigationRootCoordinator.setOverlayCoordinator(callScreenCoordinator, animated: false)
-    }
 
     private func configureNotificationManager() {
         notificationManager.setUserSession(userSession)