refactors some code to better pickup AZ_LOADSCREENCOMPONENT_ENABLED's value

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Gems/LmbrCentral/Code/Source/LmbrCentral.cpp

@@ -219,9 +219,6 @@ namespace LmbrCentral
             PolygonPrismShapeDebugDisplayComponent::CreateDescriptor(),
             TubeShapeDebugDisplayComponent::CreateDescriptor(),
             AssetSystemDebugComponent::CreateDescriptor(),
-#if AZ_LOADSCREENCOMPONENT_ENABLED
-            LoadScreenComponent::CreateDescriptor(),
-#endif // if AZ_LOADSCREENCOMPONENT_ENABLED
             });
 
         // This is an internal Amazon gem, so register it's components for metrics tracking, otherwise the name of the component won't get sent back.
@@ -248,9 +245,6 @@ namespace LmbrCentral
                    azrtti_typeid<AudioSystemComponent>(),
                    azrtti_typeid<BundlingSystemComponent>(),
                    azrtti_typeid<AssetSystemDebugComponent>(),
-#if AZ_LOADSCREENCOMPONENT_ENABLED
-                   azrtti_typeid<LoadScreenComponent>(),
-#endif // if AZ_LOADSCREENCOMPONENT_ENABLED
         };
     }