Simplify iOS Dart code

packages/image_picker/image_picker_ios/lib/image_picker_ios.dart

@@ -327,16 +327,9 @@ class ImagePickerIOS extends ImagePickerPlatform {
   Future<List<XFile>> getMultiVideoWithOptions({
     MultiVideoPickerOptions options = const MultiVideoPickerOptions(),
   }) async {
-    final List<String> paths = await _pickMultiVideoAsPath(
-      options: options,
-    );
-    return paths.map((String path) => XFile(path)).toList();
-  }
-
-  Future<List<String>> _pickMultiVideoAsPath({
-    MultiVideoPickerOptions options = const MultiVideoPickerOptions(),
-  }) {
-    return _hostApi.pickMultiVideo(
-        options.maxDuration?.inSeconds, options.limit);
+    return (await _hostApi.pickMultiVideo(
+            options.maxDuration?.inSeconds, options.limit))
+        .map((String path) => XFile(path))
+        .toList();
   }
 }