Remove unused private variable

Author: keveleigh

Assets/MRTK/Services/SpatialAwarenessSystem/MixedRealitySpatialAwarenessSystem.cs

@@ -65,12 +65,9 @@ public bool CheckCapability(MixedRealityCapability capability)
 
         #region IMixedRealityToolkitService Implementation
 
-        private MixedRealitySpatialAwarenessEventData<SpatialAwarenessMeshObject> meshEventData = null;
-
         /// <inheritdoc/>
         public override void Initialize()
         {
-            meshEventData = new MixedRealitySpatialAwarenessEventData<SpatialAwarenessMeshObject>(EventSystem.current);
             InitializeInternal();
             base.Initialize();
         }