remove unused photo library implementation

deltachat-ios/Helper/MediaPicker.swift

@@ -59,46 +59,4 @@ class MediaPicker: NSObject, UINavigationControllerDelegate, UIImagePickerContro
         }
     }
 
-
-    func showPhotoLibrary(delegate: MediaPickerDelegate) {
-        if PHPhotoLibrary.authorizationStatus() != .authorized {
-            PHPhotoLibrary.requestAuthorization { status in
-                DispatchQueue.main.async {
-                    [weak self] in
-                    switch status {
-                    case  .denied, .notDetermined, .restricted:
-                        print("denied")
-                    case .authorized:
-                        self?.presentPhotoLibrary(delegate: delegate)
-                    }
-                }
-            }
-        } else {
-            self.presentPhotoLibrary(delegate: delegate)
-        }
-    }
-
-    private func presentPhotoLibrary(delegate: MediaPickerDelegate) {
-        if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
-            let photoPicker = UIImagePickerController()
-            photoPicker.title = String.localized("gallery")
-            photoPicker.delegate = self
-            photoPicker.sourceType = .photoLibrary
-            photoPicker.allowsEditing = true
-            photoPicker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary) ?? []
-            navigationController.present(photoPicker, animated: true, completion: nil)
-            self.delegate = delegate
-        }
-    }
-
-    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
-        if let imageUrl = info[UIImagePickerController.InfoKey.imageURL] as? NSURL {
-            logger.debug("image selected: \(imageUrl)")
-            delegate?.onMediaSelected(url: imageUrl)
-        } else {
-            logger.warning("could not select image")
-        }
-        navigationController.dismiss(animated: true, completion: delegate?.onDismiss)
-    }
-
 }