Removed updateOffset from setRegion.

People can call updateOffset if they change the region or other RegionAttachment properties.

spine-libgdx/src/com/esotericsoftware/spine/attachments/RegionAttachment.java

@@ -138,7 +138,6 @@ public class RegionAttachment extends Attachment {
 			vertices[U1] = region.getU2();
 			vertices[V1] = region.getV2();
 		}
-		updateOffset();
 	}
 
 	public TextureRegion getRegion () {