Merge branch 'remove-matomo' into 'develop'

remove matomo code

See merge request R3/howto-cards!123

_includes/scripts.html

-<!-- Matomo -->
-<script type="text/javascript">
-    var _paq = window._paq || [];
-    /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
-    _paq.push(['trackPageView']);
-    _paq.push(['enableLinkTracking']);
-    (function() {
-      var u="https://howto-monitoring.lcsb.uni.lu/matomo/";
-      _paq.push(['setTrackerUrl', u+'matomo.php']);
-      _paq.push(['setSiteId', '2']);
-      var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
-      g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
-    })();
-</script>
-<noscript><p><img src="https://howto-monitoring.lcsb.uni.lu/matomo/matomo.php?idsite=2&amp;rec=1" style="border:0;" alt="" /></p></noscript>
-<!-- End Matomo Code -->
\ No newline at end of file