diff --git a/sql/tags.sql b/sql/tags.sql
index a3f2f8fb..fb5bc9d2 100644
--- a/sql/tags.sql
+++ b/sql/tags.sql
@@ -10,19 +10,3 @@ AS $$
 $$ LANGUAGE plpythonu IMMUTABLE;
 
 CREATE INDEX issues_unpickle_tags_index ON issues_issue USING btree (unpickle(tags));
-
--- CREATE OR REPLACE FUNCTION array_uniq_join (data text[], data2 text[])
---   RETURNS text[]
--- AS $$
---     tmp = set(data)
---     tmp.update(data2)
---     return tuple(tmp)
--- $$ LANGUAGE plpythonu;
---
--- DROP AGGREGATE array_uniq_concat (text[]);
--- CREATE AGGREGATE array_uniq_concat (text[])
--- (
---     sfunc = array_uniq_join,
---     stype = text[],
---     initcond = '{}'
--- );