windows: remove reference to swizzle.c file

windows/VC8/mesa/mesa/mesa.vcproj

@@ -886,10 +886,6 @@
 				RelativePath="..\..\..\..\src\mesa\main\stencil.c"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\..\src\mesa\main\swizzle.c"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\..\src\mesa\tnl\t_context.c"
 				>