Remove test message.

app/templates/main/index.html.j2

 {% extends "base.html.j2" %}
 
 {% block page_content %}
-<div class="col s12">
-  <div class="card">
-    <div class="card-content">
-      <span class="card-title">
-        Hello,
-        {% if current_user.is_authenticated %}
-        {{ current_user.username }}
-        {% else %}
-        Stranger
-        {% endif %}!
-      </span>
-    </div>
-  </div>
-
   <h2>Services</h2>
-
   <div class="row">
     <div class="col s12 m4">
       <div class="card small">