Improved code based on CppCheck results

None of this should change the engine's behavior, but the code is better
this way.


Former-commit-id: 0127769848fc1f7fc8006ee607985cfc0ead2965

SDK/src/NDK/Systems/RenderSystem.cpp

@@ -19,8 +19,6 @@ namespace Ndk
 		for (const Ndk::EntityHandle& camera : m_cameras)
 		{
 			CameraComponent& camComponent = camera->GetComponent<CameraComponent>();
-			NodeComponent& cameraNode = camera->GetComponent<NodeComponent>();
-
 			camComponent.ApplyView();
 
 			NzScene dummyScene;