Merge pull request #4129 from ScottNZ/refactor

Refactor

OpenRA.FileFormats/Primitives/ObservableCollection.cs

@@ -23,7 +23,7 @@ namespace OpenRA.FileFormats.Primitives
 		public event Action<object, object> OnSet = (o, n) => { };
 		public event Action OnRefresh = () => { };
 
-		public ObservableCollection() : base() { }
+		public ObservableCollection() { }
 		public ObservableCollection(IList<T> list) : base(list) { }
 
 		protected override void SetItem(int index, T item)
@@ -53,7 +53,7 @@ namespace OpenRA.FileFormats.Primitives
 
 		public IEnumerable ObservedItems
 		{
-			get { return base.Items; }
+			get { return Items; }
 		}
 	}
 }

OpenRA.FileFormats/Primitives/Pair.cs

@@ -9,7 +9,6 @@
 #endregion
 
 using System.Collections.Generic;
-using System;
 using System.Drawing;
 
 namespace OpenRA.FileFormats