borrar_xml_tags_vacios

----OLD TREE STARTS---
<magento_api>
  <data_item>
    <code>400</code>
    <message>Attribute weight is not applicable for product type Configurable Product</message>
  </data_item>
  <data_item>
    <code>400</code>
    <message>Resource data pre-validation error.</message>
  </data_item>
  <data_item>
    <code>1</code>
    <message></message>
  </data_item>
  <data_item>
    <code></code>
    <message>No code was given</message>
  </data_item>
  <data_item></data_item>
  <data_item>
    <code>
      <id></id>
      <valor>codigo</valor>
    </code>
    <message>No code was given</message>
  </data_item>
  <data_item_empty>
    <code>
      <id></id>
      <valor></valor>
    </code>
    <message></message>
  </data_item_empty>
</magento_api>
----OLD TREE ENDS---

----NEW TREE STARTS---
<magento_api>
  <data_item>
    <code>400</code>
    <message>Attribute weight is not applicable for product type Configurable Product</message>
  </data_item>
  <data_item>
    <code>400</code>
    <message>Resource data pre-validation error.</message>
  </data_item>
  <data_item>
    <code>1</code>
  </data_item>
  <data_item>
    <message>No code was given</message>
  </data_item>
  <data_item>
    <code>
      <valor>codigo</valor>
    </code>
    <message>No code was given</message>
  </data_item>
</magento_api>
----NEW TREE ENDS---