Remove legacy SetLineWidth methods.

OpenRA.Game/Graphics/IGraphicsDevice.cs

@@ -64,7 +64,6 @@ namespace OpenRA
 		bool SetClipboardText(string text);
 		void DrawPrimitives(PrimitiveType type, int firstVertex, int numVertices);
 
-		void SetLineWidth(float width);
 		void EnableScissor(int left, int top, int width, int height);
 		void DisableScissor();
 

OpenRA.Game/Renderer.cs

@@ -173,11 +173,6 @@ namespace OpenRA
 			CurrentBatchRenderer = null;
 		}
 
-		public void SetLineWidth(float width)
-		{
-			Device.SetLineWidth(width);
-		}
-
 		public Size Resolution { get { return Device.WindowSize; } }
 
 		public interface IBatchRenderer { void Flush();	}

OpenRA.Platforms.Default/Sdl2GraphicsDevice.cs

@@ -331,13 +331,6 @@ namespace OpenRA.Platforms.Default
 			ErrorHandler.CheckGlError();
 		}
 
-		public void SetLineWidth(float width)
-		{
-			VerifyThreadAffinity();
-			GL.LineWidth(width);
-			ErrorHandler.CheckGlError();
-		}
-
 		public Bitmap TakeScreenshot()
 		{
 			var rect = new Rectangle(Point.Empty, WindowSize);

OpenRA.Platforms.Null/NullGraphicsDevice.cs

@@ -50,7 +50,6 @@ namespace OpenRA.Platforms.Null
 		}
 
 		public void DrawPrimitives(PrimitiveType pt, int firstVertex, int numVertices) { }
-		public void SetLineWidth(float width) { }
 
 		public IVertexBuffer<Vertex> CreateVertexBuffer(int size) { return new NullVertexBuffer<Vertex>(); }
 		public ITexture CreateTexture() { return new NullTexture(); }