Remove obsolete ConstraintOptions.UseRegions option.

src/Triangle/Configuration.cs

@@ -7,8 +7,6 @@
 namespace TriangleNet
 {
     using System;
-    using TriangleNet.Meshing;
-    using TriangleNet.Meshing.Algorithm;
 
     /// <summary>
     /// Configure advanced aspects of the library.

src/Triangle/Meshing/ConstraintOptions.cs

@@ -6,14 +6,6 @@ namespace TriangleNet.Meshing
     /// </summary>
     public class ConstraintOptions
     {
-        // TODO: remove ConstraintOptions.UseRegions
-
-        /// <summary>
-        /// Gets or sets a value indicating whether to use regions.
-        /// </summary>
-        [System.Obsolete("Not used anywhere, will be removed in beta 4.")]
-        public bool UseRegions { get; set; }
-
         /// <summary>
         /// Gets or sets a value indicating whether to create a Conforming
         /// Delaunay triangulation.

src/Triangle/Meshing/QualityMesher.cs

@@ -12,7 +12,6 @@ namespace TriangleNet.Meshing
     using TriangleNet.Geometry;
     using TriangleNet.Logging;
     using TriangleNet.Meshing.Data;
-    using TriangleNet.Tools;
     using TriangleNet.Topology;
 
     /// <summary>

src/Triangle/TrianglePool.cs

@@ -8,7 +8,6 @@ namespace TriangleNet
 {
     using System;
     using System.Collections.Generic;
-    using TriangleNet.Geometry;
     using TriangleNet.Topology;
 
     public class TrianglePool : ICollection<Triangle>

src/Triangle/Voronoi/BoundedVoronoi.cs

@@ -6,12 +6,10 @@
 
 namespace TriangleNet.Voronoi
 {
-    using System.Collections.Generic;
     using TriangleNet.Geometry;
     using TriangleNet.Tools;
     using TriangleNet.Topology.DCEL;
 
-    using HVertex = TriangleNet.Topology.DCEL.Vertex;
     using TVertex = TriangleNet.Geometry.Vertex;
 
     public class BoundedVoronoi : VoronoiBase