Removed redundant Collection Initializers

Removed Using directives that are not required

MediaBrowser.Model/Extensions/ListHelper.cs

@@ -10,7 +10,7 @@ namespace MediaBrowser.Model.Extensions
         {
             if (value == null)
             {
-                throw new ArgumentNullException("value");
+                throw new ArgumentNullException(nameof(value));
             }
 
             return list.Contains(value, StringComparer.OrdinalIgnoreCase);