Odoo docker v13

In Settings --> Technical --> Views --> "web.brand_promotion" View I commented two lines and saved it. It works, because I see that "Powered By Odoo" disappeared.
Below is code from GUI:

 <?xml version="1.0"?>

<t name="Brand Promotion Message" t-name="web.brand_promotion_message">

        <t t-set="odoo_logo">

            <a target="_blank" t-attf-href="http://www.odoo.com?utm_source=db&amp;utm_medium=#{_utm_medium}" class="badge badge-light">

                <img alt="Odoo" src="/web/static/src/img/odoo_logo_tiny.png" style="height: 1em; vertical-align: baseline;"/>

            </a>

        </t>

        <!--<t t-set="final_message">Powered by %s%s</t>-->

        <!--<t t-raw="final_message % (odoo_logo, _message and ('- %s' % _message) or '')"/>-->

    </t>

Now I want to find this comment in source code. I found it in "/usr/lib/python3/dist-packages/odoo/addons/web/views/webclient_templates.xml"  

But here nothing has changed...

Moreover I found in Postgres database "ir_ui_view" table where are stored views, but I didn't see any informations about my change. 

I restarted odoo and nothing helped.

Where can I find this change?