Remove obsolete template files

website/thaliawebsite/templates/menu/old-menu.html

-<div id="primary-navigation" class="container fullwidth">
-    <!-- .menu-responsive -->
-    <a class="menu-responsive"><span class="menu-icon-nav"></span><span class="menu-title">Home</span></a>
-    <!-- /.menu-responsive -->
-
-    <!-- menu -->
-    <ul class="nav">
-        {% for item in menu %}
-            {% if not item.authenticated or request.user.is_authenticated %}
-            {% url item.name as path %}
-            <li {% if request.path == path %}class="nav-path-selected"{% endif %}>
-                <a href="{% if path %}{{ path }}{% else %}{{ item.url }}{% endif %}"
-                    target="_self" {% if request.path == path %}class="nav-path-selected"{% endif %}>
-                    {{ item.title }}
-                </a>
-                {% if 'submenu' in item %}
-                    {% include 'menu/old-submenu.html' with submenu=item.submenu %}
-                {% endif %}
-            </li>
-            {% endif %}
-        {% endfor %}
-    </ul>
-    <!-- /menu -->
-</div>

website/thaliawebsite/templates/menu/old-submenu.html

-<ul>
-    {% for item in submenu %}
-      {% if not item.authenticated or request.user.is_authenticated %}
-        {% url item.name as path %}
-        <li {% if request.path == path %}class="nav-selected nav-path-selected"{% endif %}>
-            <a href="{% if path %}{{ path }}{% else %}{{ item.url }}{% endif %}"
-               target="_self"
-               {% if request.path == path %}class="nav-selected nav-path-selected"{% endif %}>
-                {{ item.title }}
-            </a>
-            {% if 'submenu' in item %}
-                {% include 'menu/old-submenu.html' with submenu=item.submenu %}
-            {% endif %}
-        </li>
-      {% endif %}
-    {% endfor %}
-</ul>