Remove useless template

umap/templates/leaflet_storage/map_update_settings.html

-{% load umap_tags i18n %}
-<h3>{% trans "Map settings" %}</h3>
-<form action="{% url 'map_update_settings' map.pk %}" method="post" id="map_edit">
-    {% csrf_token %}
-    {% for field in form %}
-        <div class="formbox">
-            {{ field }}
-        </div>
-        <small class="help-text">{{ field.help_text }}</small>
-    {% endfor %}
-    <input type="submit" class="button"/>
-</form>
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