Static Mesh: Update shape factories

sources/engine/Xenko.Assets/Physics/ColliderShapeFactories.cs

@@ -95,4 +95,17 @@ public override ColliderShapeAsset New()
             return Create();
         }
     }
+
+    public class ColliderShapeStaticMeshFactory : AssetFactory<ColliderShapeAsset>
+    {
+        public static ColliderShapeAsset Create()
+        {
+            return new ColliderShapeAsset { ColliderShapes = { new StaticMeshColliderShapeDesc() } };
+        }
+
+        public override ColliderShapeAsset New()
+        {
+            return Create();
+        }
+    }
 }

sources/engine/Xenko.Physics/Data/StaticMeshColliderShapeDesc.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Xenko contributors (https://xenko.com) and Silicon Studio Corp. (https://www.siliconstudio.co.jp)
 // Distributed under the MIT license. See the LICENSE.md file in the project root for more information.
 
-using System;
 using System.Collections.Generic;
 using Xenko.Core;
 using Xenko.Core.Mathematics;