feat: remove SimplePhysicsWorld

tests/destrum_tests.cpp

@@ -28,7 +28,6 @@
 #include <destrum/Serialization/PrefabCache.h>
 #include <destrum/Serialization/PrefabSerializer.h>
 #include <destrum/Serialization/SceneSerializer.h>
-#include <destrum/Physics/SimplePhysicsWorld.h>
 #include <destrum/Physics/JoltPhysicsWorld.h>
 #include <destrum/Components/Physics/SphereCollider.h>
 #include <destrum/Components/Physics/BoxCollider.h>
@@ -384,7 +383,10 @@ namespace {
 
     void testPhysicsWorldUnits()
     {
-        SimplePhysicsWorld world{glm::vec3{0.0f}};
+        JoltPhysicsWorld world{{
+            .workerThreadCount = 1,
+            .gravity = glm::vec3{0.0f}
+        }};
         GameObject object{"scaled-physics"};
         object.GetTransform().SetLocalScale(glm::vec3{0.5f});
         object.AddComponent<SphereCollider>(1.0f);