cleanup

Project/Assets/ML-Agents/Examples/SharedAssets/Scripts/ProjectSettingsOverrides.cs

         float m_OriginalMaximumDeltaTime;
         int m_OriginalSolverIterations;
         int m_OriginalSolverVelocityIterations;
-        bool m_OriginalUseEnhancedDeterminism;
         bool m_OriginalReuseCollisionCallbacks;
 
         [Tooltip("Increase or decrease the scene gravity. Use ~3x to make things less floaty")]