Remove obsolete _bt_insert_parent() comment.

Remove a comment that refers to a coding practice that was fully removed
by commit a8b8f4db, which introduced MarkBufferDirty().  It looks like
the comment was even obsolete before then, since it concerns
write-ordering dependencies with synchronous buffer writes.

diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c
index 49a94d8cd9b9141fa5dd6e68e6865ab5a6cf1aec..9c82ca6597f057cec5b3f06c58a6ccbadce3afe4 100644 (file)
--- a/src/backend/access/nbtree/nbtinsert.c
+++ b/src/backend/access/nbtree/nbtinsert.c
@@ -1786,7 +1786,6 @@ _bt_insert_parent(Relation rel,
         */
        _bt_relbuf(rel, rbuf);
 
-       /* Check for error only after writing children */
        if (pbuf == InvalidBuffer)
            elog(ERROR, "failed to re-find parent key in index \"%s\" for split pages %u/%u",
                 RelationGetRelationName(rel), bknum, rbknum);