Remove last used message if key’s never been used

I don’t think it adds anything to tell you that a key’s never been used.
The value of the ‘key was used 3 minutes ago’ message is in stopping you
accidentally revoking something you shouldn’t have.

app/main/views/templates.py

@@ -436,7 +436,7 @@ def delete_service_template(service_id, template_id):
         )
     except HTTPError as e:
         if e.status_code == 404:
-            message = 'It’s never been used.'.format(template['name'])
+            message = None
         else:
             raise e
 

app/templates/views/templates/template.html

@@ -30,9 +30,11 @@
   {% elif template_delete_confirmation_message %}
     <div class="bottom-gutter">
       {% call banner_wrapper(type='dangerous', subhead=template_delete_confirmation_message[0]) %}
+        {% if template_delete_confirmation_message[1] %}
           <p>
             {{ template_delete_confirmation_message[1] }}
           </p>
+        {% endif %}
         <form method='post'>
           <input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
           <input type="submit" class="button" name="delete" value="Confirm" />

tests/app/main/views/test_templates.py

@@ -725,9 +725,7 @@ def test_should_show_delete_template_page_with_never_used_block(
         _test_page_title=False,
     )
     assert page.h1.text == 'Are you sure you want to delete Two week reminder?'
-    assert normalize_spaces(page.select('.banner-dangerous p')[0].text) == (
+    assert not page.select('.banner-dangerous p')
-        'It’s never been used.'
-    )
     assert normalize_spaces(page.select('.sms-message-wrapper')[0].text) == (
         'service one: Template <em>content</em> with & entity'
     )