Merge pull request #3831 from wiwei/removethewarning

Remove the unused variable warning.

Author: wiwei

Assets/MixedRealityToolkit.Examples/Demos/EyeTracking/Demo_ScrollPanZoom/Scripts/PanZoom_RectTransf.cs

@@ -70,10 +70,6 @@ public class PanZoom_RectTransf : PanZoomBase_RectTransf
         [Range(0, 10)]
         private float skimProofUpdateSpeed = 5f;
 
-        // The base PanAndZoom class can also be used with UV textures for which the dimensions are different to a RectTransform.
-        // To allow to keep the speed values that users can assign consistent, let's internally convert the values.
-        private float convertSpeedToUVSpace = -200.0f;
-
         protected override void Start()
         {
             // Assigning values to base PanZoom class