temporary HUD hack to fix Main Thread Checker error

* see pkluz#245 (with my comment)
* see pkluz#251 - which documents an attempted fix in pull request pkluz/PKHUD/pkluz#252
* see another attempt which just conditionally enables the code - pkluz/PKHUD/pkluz#260

PKHUD/FrameView.swift

@@ -33,20 +33,20 @@ internal class FrameView: UIVisualEffectView {
 
  contentView.addSubview(content)
 
- let offset = 20.0
-
- let motionEffectsX = UIInterpolatingMotionEffect(keyPath: "center.x", type: .tiltAlongHorizontalAxis)
- motionEffectsX.maximumRelativeValue = offset
- motionEffectsX.minimumRelativeValue = -offset
-
- let motionEffectsY = UIInterpolatingMotionEffect(keyPath: "center.y", type: .tiltAlongVerticalAxis)
- motionEffectsY.maximumRelativeValue = offset
- motionEffectsY.minimumRelativeValue = -offset
-
- let group = UIMotionEffectGroup()
- group.motionEffects = [motionEffectsX, motionEffectsY]
-
- addMotionEffect(group)
+// let offset = 20.0
+//
+// let motionEffectsX = UIInterpolatingMotionEffect(keyPath: "center.x", type: .tiltAlongHorizontalAxis)
+// motionEffectsX.maximumRelativeValue = offset
+// motionEffectsX.minimumRelativeValue = -offset
+//
+// let motionEffectsY = UIInterpolatingMotionEffect(keyPath: "center.y", type: .tiltAlongVerticalAxis)
+// motionEffectsY.maximumRelativeValue = offset
+// motionEffectsY.minimumRelativeValue = -offset
+//
+// let group = UIMotionEffectGroup()
+// group.motionEffects = [motionEffectsX, motionEffectsY]
+//
+// addMotionEffect(group)
  }
 
  private var _content = UIView()