Pour enlever sur votre partie front dfe votre site internet la mention : Bootstrap is a front-end framework of Twitter, Inc. Code licensed under MIT License.Font Awesome font licensed under SIL OFL 1.1.
Aller dans template / purity_iii / tpls / blocks et le fichier footer.php et enlever la partie du code :
<small>
<a href="http://twitter.github.io/bootstrap/" title="Bootstrap by Twitter" target="_blank">Bootstrap</a> is a front-end framework of Twitter, Inc. Code licensed under <a href="https://github.com/twbs/bootstrap/blob/master/LICENSE" title="MIT License" target="_blank">MIT License.</a>
</small>
<small>
<a href="http://fortawesome.github.io/Font-Awesome/" target="_blank">Font Awesome</a> font licensed under <a href="http://scripts.sil.org/OFL">SIL OFL 1.1</a>.
</small>