diff --git a/django_informixdb/features.py b/django_informixdb/features.py
index 4b20410..e145f17 100644
--- a/django_informixdb/features.py
+++ b/django_informixdb/features.py
@@ -3,7 +3,7 @@
 
 
 class DatabaseFeatures(BaseDatabaseFeatures):
-    has_bulk_insert = False
+    has_bulk_insert = False     # informix does not have a bulk insert query
     can_use_chunked_reads = True
     supports_microsecond_precision = False
     supports_regex_backreferencing = False
diff --git a/django_informixdb/operations.py b/django_informixdb/operations.py
index 2c6ccd7..d9da8c8 100644
--- a/django_informixdb/operations.py
+++ b/django_informixdb/operations.py
@@ -128,8 +128,3 @@ def sql_flush(self, style, tables, sequences, allow_cascade=False):
             style.SQL_FIELD(self.quote_name(table))
         ) for table in tables]
         return sql
-
-    #def bulk_insert_sql(self, fields, placeholder_rows):
-    #    placeholder_rows_sql = (", ".join(row) for row in placeholder_rows)
-    #    values_sql = ", ".join("(%s)" % sql for sql in placeholder_rows_sql)
-    #    return "VALUES " + values_sql