remove duplicated disconnectedCallback call

Author: dmarcos

src/core/a-entity.js

@@ -109,8 +109,6 @@ class AEntity extends ANode {
 
     if (!this.parentEl) { return; }
 
-    super.disconnectedCallback();
-
     // Remove components.
     for (componentName in this.components) {
       this.removeComponent(componentName, false);