Removed extra brush_props ctor to match the paper. Resolves cpp-io2d/io2dts#114.

Author: mikebmcl

P0267_RefImpl/P0267_RefImpl/xio2d_impl.h

@@ -2331,7 +2331,6 @@ namespace std::experimental::io2d {
 			return _Matrix;
 		}
 
-		constexpr brush_props::brush_props() noexcept {}
 		constexpr brush_props::brush_props(experimental::io2d::wrap_mode w,
 			experimental::io2d::filter fi,
 			experimental::io2d::fill_rule fr,

P0267_RefImpl/P0267_RefImpl/xsurfaces.h

@@ -116,14 +116,11 @@ namespace std::experimental::io2d {
 
 		class brush_props {
 			experimental::io2d::wrap_mode _Wrap_mode = experimental::io2d::wrap_mode::none;
-			experimental::io2d::filter _Filter = experimental::io2d::filter::bilinear;
+			experimental::io2d::filter _Filter = experimental::io2d::filter::good;
 			experimental::io2d::fill_rule _Fill_rule = experimental::io2d::fill_rule::winding;
 			matrix_2d _Matrix;
 
 		public:
-			// suprlus to paper
-			constexpr brush_props() noexcept;
-
 			constexpr brush_props(io2d::wrap_mode w = io2d::wrap_mode::none, io2d::filter fi = io2d::filter::good, io2d::fill_rule fr = io2d::fill_rule::winding, matrix_2d m = matrix_2d{}) noexcept;
 			constexpr void filter(io2d::filter fi) noexcept;
 			constexpr void wrap_mode(io2d::wrap_mode w) noexcept;