Remove obsolete Nice theme code.

mcs/class/System.Windows.Forms/System.Windows.Forms.Theming/Nice/.gitattributes

@@ -1 +0,0 @@
-/TabControlPainter.cs -crlf

mcs/class/System.Windows.Forms/System.Windows.Forms.Theming/Nice/TabControlPainter.cs

@@ -1,38 +0,0 @@
-// Permission is hereby granted, free of charge, to any person obtaining
-// a copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to
-// permit persons to whom the Software is furnished to do so, subject to
-// the following conditions:
-//
-// The above copyright notice and this permission notice shall be
-// included in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-//
-// Copyright (c) 2007 Novell, Inc.
-//
-// Authors:
-//	Andreia Gaita (avidigal@novell.com)
-
-using System;
-using System.Drawing;
-using System.Windows.Forms;
-
-namespace System.Windows.Forms.Theming.Nice
-{
-	/// <summary>
-	/// Summary description for TabControl.
-	/// </summary>
-	internal class TabControlPainter: Default.TabControlPainter
-	{
-		
-	}
-}