[unity] Remove support for Unity 5.2

spine-unity/Assets/spine-unity/Modules/SkeletonGraphic/Editor/SkeletonGraphicInspector.cs

@@ -28,10 +28,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if (UNITY_5_0 || UNITY_5_1 || UNITY_4_0 || UNITY_4_1 || UNITY_4_2 || UNITY_4_3 || UNITY_4_4 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7)
-#define PREUNITY_5_2
-#endif
-
 using UnityEngine;
 using UnityEditor;
 using Spine;
@@ -44,7 +40,6 @@ namespace Spine.Unity.Editor {
 	public class SkeletonGraphicInspector : UnityEditor.Editor {
 		SerializedProperty material_, color_;
 		SerializedProperty skeletonDataAsset_, initialSkinName_;
-	#if !PREUNITY_5_2
 		SerializedProperty startingAnimation_, startingLoop_, timeScale_, freeze_, unscaledTime_, tintBlack_;
 		SerializedProperty raycastTarget_;
 
@@ -230,7 +225,5 @@ namespace Spine.Unity.Editor {
 		}
 
 		#endregion
-
-	#endif
 	}
 }