Revert "Merge branch '31-return-404-on-missing-resource-type' into 'v1.3'"

This reverts commit 7fcef1ce, reversing
changes made to 772f22c9.

ckanext/odsh/collection/helpers.py

@@ -181,6 +181,4 @@ def get_latest_resources_for_format(collection_name, resource_format):
         return None
     resources_with_asked_type = [r for r in resources if r.get('format').upper() == resource_format.upper()]
     resources_sorted = sorted(resources_with_asked_type, key=itemgetter('id','created'), reverse=True)
-    if len(resources_sorted) < 2:
-        return None
     return resources_sorted[-1]