Feeds: removed the col- class from the Flickr list items for them to flow at sm and md views

As seen on the [campaign page](http://wet-boew.github.io/themes-dist/GCWeb/campaign-en.html), at md or sm view, the images `li` are spaced out by using `class="col-md-4 col-sm-6"` and the `list-inline` in the `ul` is not doing it's job.