How to remove odoo 11 footer

Active developer mode > User interface > Views > Search Powered and choice “views architecture”

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<?xml version="1.0"?>
<t t-name="mail.message_user_assigned">
            <p>Dear <t t-esc="object.user_id.name"/>,</p>
            <p>You have been assigned to the <t t-esc="object._description.lower()"/> <t t-esc="object.name_get()[0][1]"/>.</p>
            <p>
                <a t-att-href="'/mail/view?model=%s&amp;res_id=%s' % (object._name, object.id)" style="background-color: #9E588B; margin-top: 10px; padding: 10px; text-decoration: none; color: #fff; border-radius: 5px; font-size: 16px;">
                    View <t t-esc="object._description.lower()"/>
                </a>
            </p>
            <p style="color:#9E588B;">Powered by <a target="_blank" href="https://www.XXX.com">XXX</a>.</p>
        </t>