Use an https callback for OIDC once again. (#3461)

* Use the new WAS callback type and return back to the https callback for OIDC.

* Simplify OIDCAuthenticationPresenter now it doesn't need to handle universal links.

* Remove old unit tests.

ElementX/Sources/FlowCoordinators/AuthenticationFlowCoordinator.swift

@@ -65,15 +65,6 @@ class AuthenticationFlowCoordinator: FlowCoordinatorProtocol {
         fatalError()
     }
     
-    func handleOIDCRedirectURL(_ url: URL) {
-        guard let oidcPresenter else {
-            MXLog.error("Failed to find an OIDC request in progress.")
-            return
-        }
-        
-        oidcPresenter.handleUniversalLinkCallback(url)
-    }
-    
     // MARK: - Private
     
     private func showStartScreen() {

ElementX/Sources/FlowCoordinators/RoomFlowCoordinator.swift

@@ -163,7 +163,7 @@ class RoomFlowCoordinator: FlowCoordinatorProtocol {
             }
         case .roomAlias, .childRoomAlias, .eventOnRoomAlias, .childEventOnRoomAlias:
             break // These are converted to a room ID route one level above.
-        case .roomList, .userProfile, .call, .genericCallLink, .oidcCallback, .settings, .chatBackupSettings:
+        case .roomList, .userProfile, .call, .genericCallLink, .settings, .chatBackupSettings:
             break // These routes can't be handled.
         }
     }

ElementX/Sources/FlowCoordinators/UserSessionFlowCoordinator.swift

@@ -282,8 +282,6 @@ class UserSessionFlowCoordinator: FlowCoordinatorProtocol {
             presentCallScreen(genericCallLink: url)
         case .settings, .chatBackupSettings:
             settingsFlowCoordinator.handleAppRoute(appRoute, animated: animated)
-        case .oidcCallback:
-            break
         }
     }