How to remove unnecessary visits from Piwik and Matomo
To remove unnecessary visits from Piwiki and Matomo, you can embed a link in the Visitors log report.
1 - create a file delete.php in the root directory of Piwik

2 - Open the file /plugins/Live/templates/_dataTableViz_visitorLog.twig
and add after
{% endif %}
{% if visitor.getColumn('visitorTypeIcon') or visitor.getColumn('countryFlag') %}
<br/>
{% endif %}
lines
{# smirnov #}
Visit ID {{ visitor.getColumn("idVisit") }} <a href="https://<SITE>/<PIWIK DIR>/delete.php?id={{ visitor.getColumn("idVisit") }}" target="_blank" onclick="return confirm('Are you sure?')">Delete</a>
<br/>