Remove incorrect RootURL link from e-mail template. Closes #432

static/email-templates/base.html

@@ -81,7 +81,7 @@
     <div class="wrap">
         <div class="header">
             {{ if ne LogoURL "" }}
-                <a href="{{ RootURL }}"><img src="{{ LogoURL }}" alt="listmonk" /></a>
+                <img src="{{ LogoURL }}" alt="listmonk" />
             {{ end }}
         </div>
 {{ end }}