Code cleanup.

Author: ekcoh

Packages/com.unity.inputsystem/InputSystem/InputManager.cs

@@ -1858,7 +1858,6 @@ internal void Initialize(IInputRuntime runtime, InputSettings settings)
             Debug.Assert(settings != null);
 
             m_Settings = settings;
-            m_LazyLoadCustomTypes =  () => RegisterCustomTypes(); // Cached delegate
 
             InitializeActions();
             InitializeData();