[unity] Minor cleanup.

spine-unity/Assets/spine-unity/ISkeletonAnimation.cs

@@ -29,7 +29,7 @@
  *****************************************************************************/
 
 namespace Spine.Unity {
-	public delegate void UpdateBonesDelegate (ISkeletonAnimation animatedSkeletonComponent);
+	public delegate void UpdateBonesDelegate (ISkeletonAnimation animated);
 
 	/// <summary>A Spine-Unity Component that animates a Skeleton but not necessarily with a Spine.AnimationState.</summary>
 	public interface ISkeletonAnimation {

spine-unity/Assets/spine-unity/SkeletonUtility/SkeletonUtilityBone.cs

@@ -30,9 +30,6 @@
 
 // Contributed by: Mitch Thompson
 
-using System;
-using System.IO;
-using System.Collections.Generic;
 using UnityEngine;
 using Spine;
 

spine-unity/Assets/spine-unity/SkeletonUtility/SkeletonUtilityConstraint.cs

@@ -28,8 +28,9 @@
  * POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
+// Contributed by: Mitch Thompson
+
 using UnityEngine;
-using System.Collections;
 
 namespace Spine.Unity {
 	[RequireComponent(typeof(SkeletonUtilityBone)), ExecuteInEditMode]