1. Log in to the Odoo admin as administrator. Activate Technical Features, if not already activated, by going to Settings > Users > Users > Admin > Edit > Usability > Technical Features > check the box (on), click Save.
2. Go to Settings > Technical > User Interface > Views.
In the search box, next to filter icon, type "Footer Copyright", and hit enter to search.
3. It will show: View name: Footer Copyright. Click to open it. Click Edit.
Comment out lines of the code as follows:
<!-- Powered by <a class="label label-danger" href="http://www.odoo.com/page/website-builder">Odoo</a>,
the #1 <a href="http://www.odoo.com/page/e-commerce">Open Source eCommerce</a>. -->
4. Refresh the browser view of your Odoo front end website. Log out and try to logi in again. The previously visible "Powered by" backlinks and text, are gone.