Removed unused code

I18N Commander/UI WinForms/Components/Setting.cs

@@ -246,8 +246,7 @@ public sealed partial class Setting : UserControl
         // We load the corresponding culture for that index. As dropdown items, we show
         // all other available cultures:
         var allCultures = await AppSettings.GetCultureInfos();
-        var sourceCulture = allCultures.FirstOrDefault(n => n.Index == currentSourceCultureIndex);
-        
+
         // Attention: We have to store the culture's index, because the index is not
         // continuous and can change when the user adds or removes a culture!
         var settingData = new SettingUIData(