removed pointer handler

Author: StephenHodgson

Assets/MixedRealityToolkit-SDK/Features/UX/Scripts/Receivers/InteractionReceiver.cs

@@ -16,7 +16,6 @@ namespace Microsoft.MixedReality.Toolkit.SDK.UX.Receivers
     public abstract class InteractionReceiver : BaseInputHandler,
         IMixedRealityFocusChangedHandler,
         IMixedRealityInputHandler,
-        IMixedRealityPointerHandler,
         IMixedRealityGestureHandler<Vector2>,
         IMixedRealityGestureHandler<Vector3>,
         IMixedRealityGestureHandler<Quaternion>