Remove duplicate header from downgrade script

client/cdb_dataservices_client--0.22.0--0.21.0.sql

@@ -6,12 +6,6 @@
 SET search_path = "$user",cartodb,public,cdb_dataservices_client;
 
 -- HERE goes your code to upgrade/downgrade
---DO NOT MODIFY THIS FILE, IT IS GENERATED AUTOMATICALLY FROM SOURCES
--- Complain if script is sourced in psql, rather than via CREATE EXTENSION
-\echo Use "CREATE EXTENSION cdb_dataservices_client" to load this file. \quit
-
--- Make sure we have a sane search path to create/update the extension
-SET search_path = "$user",cartodb,public,cdb_dataservices_client;
 --
 -- Geocoder server connection config
 --