Remove generic status update email template

templates/emails/rejected.body.txt

@@ -0,0 +1,17 @@
+Hi,
+
+Unfortunately your hamprint submission "{{ submission.slug }}" was rejected{% if previous_status %} during {{ previous_status }}{% endif %}.
+
+Reason:
+
+    {{ submission.operator_notes|default:"(no reason recorded)" }}
+
+You're welcome to fix the issue and submit a new print -- the form is at
+{{ site_url }}/submit/. This rejected submission will be removed from our
+records in 24 hours.
+
+If you think this rejection was a mistake, reply to this email or reach
+out to the operators at hamlab.lt.
+
+— hamprint
+{{ site_url }}