fix(entity-manager): revert entity prototype test. gives false positi…

…ves in ts

src/entity-manager.js

@@ -47,14 +47,6 @@ export class EntityManager {
   * @chainable
   */
  registerEntity(EntityClass) {
    if (!Entity.isPrototypeOf(EntityClass)) {
      throw new Error(`
        Trying to register non-Entity with aurelia-orm.
        Are you using 'import *' to load your entities?
        <http://aurelia-orm.spoonx.org/configuration.html>
      `);
    }

    this.entities[OrmMetadata.forTarget(EntityClass).fetch('resource')] = EntityClass;

    return this;

test/entity-manager.spec.js

@@ -38,7 +38,7 @@ describe('EntityManager', function() {
      expect(entityManager.entities).toEqual({'with-resource': WithResource});
    });

    it('Should throw when register with non-Entity', function() {
    xit('Should throw when register with non-Entity', function() {
      let entityManager = new EntityManager(new Container());
      class Wrong {}