small code optimisations as suggested

OpenRA.FileFormats/PlayerColorRemap.cs

@@ -21,10 +21,7 @@ namespace OpenRA.FileFormats
 
 		static int[] GetRemapRamp(int[] Ramp)
 		{
-			int[] RemapRamp = new int[Ramp.Length];
-			for (var i=0; i < Ramp.Length; i++)
-				RemapRamp[i] = Ramp[i] - Ramp[0];
-
+			var RemapRamp = Ramp.Select(r => r - Ramp[0]).ToArray();
 			return RemapRamp;
 		}
 

OpenRA.Game/Traits/World/PlayerColorPalette.cs

@@ -17,7 +17,7 @@ namespace OpenRA.Traits
 	{
 		public readonly string BasePalette = null;
 		public readonly string BaseName = "player";
-		public readonly int[] RemapIndex = new[] {};
+		public readonly int[] RemapIndex = {};
 
 		public object Create( ActorInitializer init ) { return new PlayerColorPalette( init.self.Owner, this ); }
 	}

OpenRA.Mods.D2k/OpenRA.Mods.D2k.csproj

@@ -91,7 +91,4 @@ cd "$(SolutionDir)"</PostBuildEvent>
       <Name>OpenRA.Mods.RA</Name>
     </ProjectReference>
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Render\" />
-  </ItemGroup>
 </Project>