Remove duplicated getType() from generated content entities

[pfrenssen]

Currently when a content entity is generated that supports bundles, this piece of code is generated in it:

/**
 * {@inheritdoc}
 */
public function getType() {
  return $this->bundle();
}

This getter is duplicating EntityInterface::bundle() which is the standard way of getting the bundle from any entity.

Having this getType() available only on entities generated by Drupal Console is confusing, since it is missing from core entities. It also doesn't serve any purpose, it is just duplicating existing functionality.

[jmolivas]

@pfrenssen nice catch. Thanks for your contribution, your PR was merged. This will be included on the next release.