Do not display reference column in template.

coin/members/templates/members/subscriptions.html

@@ -8,7 +8,6 @@
         <tr>
             <th width="60">Type</th>
             <th>Offre</th>
-            <th>Référence</th>
             <th>Date de souscription</th>
             <th>Date de résiliation</th>
             <th>Commentaire</th>
@@ -20,7 +19,6 @@
         <tr>
             <td>{{ subscription.offer.get_configuration_type_display }}</td>
             <td>{{ subscription.offer.name }}</td>
-            <td class="nowrap">{{ subscription.get_subscription_reference }}</td>
             <td>{{ subscription.subscription_date }}</td>
             <td>{{ subscription.resign_date|default_if_none:"" }}</td>
             <td>{{ subscription.configuration.comment }}</td>
@@ -32,7 +30,6 @@
         <tr class="inactive">
             <td>{{ subscription.offer.get_configuration_type_display }}</td>
             <td>{{ subscription.offer.name }}</td>
-            <td class="nowrap">{{ subscription.get_subscription_reference }}</td>
             <td>{{ subscription.subscription_date }}</td>
             <td>{{ subscription.resign_date|default_if_none:"" }}</td>
             <td>{{ subscription.configuration.comment }}</td>