Remove the references to plpgsql extension

This has been built-in since postgresql 9.0

diff --git a/script/normalise-structure b/script/normalise-structure
index a659117a9a2cdeedc84746528c838385a08e0dc5..7f3c133f07cc6b7d7bd6d0e42fdd9dd6c64b5300 100644 (file)
--- a/script/normalise-structure
+++ b/script/normalise-structure
@@ -1,7 +1,5 @@
 /^$/d
 /^--/d
-/^CREATE EXTENSION IF NOT EXISTS plpgsql /d
-/^COMMENT ON EXTENSION plpgsql /d
 /^SET default_with_oids /d
 /^SET default_table_access_method /d
 /^SET idle_in_transaction_session_timeout /d