diff --git a/src/backend/catalog/catalog.c b/src/backend/catalog/catalog.c
index 11936a6571..a6e5119099 100644
--- a/src/backend/catalog/catalog.c
+++ b/src/backend/catalog/catalog.c
@@ -317,13 +317,6 @@ IsSharedRelation(Oid relationId)
  * consecutive existing OIDs.  This is a mostly reasonable assumption for
  * system catalogs.
  *
- * This is exported separately because there are cases where we want to use
- * an index that will not be recognized by RelationGetOidIndex: TOAST tables
- * have indexes that are usable, but have multiple columns and are on
- * ordinary columns rather than a true OID column.  This code will work
- * anyway, so long as the OID is the index's first column.  The caller must
- * pass in the actual heap attnum of the OID column, however.
- *
  * Caller must have a suitable lock on the relation.
  */
 Oid