Commerce product template use 50% of width

Problem/Motivation

The original template code on commerce-product.html.twig is:

<article{{ attributes }}>
  <div class="row">
    <div class="col-sm-6">{{- product|without('variation_attributes', 'field_imagen') -}}</div>
    <div class="photo col-sm-6">{{ product.field_imagen }}</div>
  </div>
</article>

And then products just spread over 50% of the screen on small screens and wider when you are not using field_imagen field. In fact, I think this field is not a default commerce field and I don't know what is doing here...

Proposed resolution

Delete this template if default commerce template is applied instead. I can do a patch if requiered ;-)