Bone: fix bug introduced by latest changes (#8572)

* Fix undefined matrix

* Fix missing inverse computation

* Fix bug introduced by previous fix...

src/Bones/bone.ts

@@ -863,8 +863,6 @@ export class Bone extends Node {
             }
         }
 
-        this._absoluteTransform.invertToRef(this._invertedAbsoluteTransform);
-
         var children = this.children;
         var len = children.length;