remove unused EditContactCoordinatorProtocol

deltachat-ios/Controller/NewContactController.swift

@@ -4,7 +4,7 @@ import DcCore
 class NewContactController: UITableViewController {
 
     let dcContext: DcContext
-    weak var coordinator: EditContactCoordinatorProtocol?
+    weak var coordinator: EditContactCoordinator?
     var openChatOnSave = true
 
     let emailCell = TextFieldCell.makeEmailCell()

deltachat-ios/Coordinator/AppCoordinator.swift

@@ -862,7 +862,7 @@ class EditGroupCoordinator: Coordinator {
 }
 
 // MARK: - EditContactCoordinator
-class EditContactCoordinator: Coordinator, EditContactCoordinatorProtocol {
+class EditContactCoordinator: Coordinator {
     var dcContext: DcContext
     let navigationController: UINavigationController
 
@@ -900,11 +900,6 @@ protocol ContactDetailCoordinatorProtocol: class {
     func showGallery()
 }
 
-protocol EditContactCoordinatorProtocol: class {
-    func navigateBack()
-    func showChat(chatId: Int)
-}
-
 protocol WelcomeCoordinator: class {
     func presentLogin()
     func handleLoginSuccess()