rewrited the simplenews template: hidden node title

web/themes/custom/materiotheme/templates/simplenews-newsletter-body.html.twig

@@ -49,7 +49,7 @@
             <tr>
               <td style="text-align:left;">
 
-                <h2>{{ title }}</h2>
+                {# <h2>{{ title }}</h2> #}
                 {{ build }}
 
                 <table style="margin: 0 0 0 10px; border-collapse: collapse; color: #444444; font-family: arial; font-size: 12px; border-color: #dddddd; background-color: #ffffff;">