Don't show the document types of an index instance.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -116,7 +116,7 @@
   via environment variable.
 - The official config filename is config.yml.
 - Interpret ALLOWED_HOSTS as YAML.
-
+- Don't show the document types of an index instance.
 
 3.0.3 (2018-08-17)
 ==================

mayan/apps/document_indexing/apps.py

@@ -103,10 +103,6 @@ class DocumentIndexingApp(MayanAppConfig):
                 user=context['request'].user
             )
         )
-        SourceColumn(
-            source=IndexInstance, label=_('Document types'),
-            attribute='get_document_types_names'
-        )
 
         SourceColumn(
             source=IndexTemplateNode, label=_('Level'),