Changed api key verifying to client instead of server

server/extension/sql/0.0.1/30_admin0.sql

@@ -5,11 +5,6 @@ RETURNS Geometry AS $$
     plpy.debug('Entering geocode_admin0_polygons')
     plpy.debug('user_id = %s' % user_id)
 
-    #-- Access control
-    #-- TODO: this should be part of cdb python library
-    if user_id == 'publicuser':
-        plpy.error('The api_key must be provided')
-
     #--TODO: rate limiting check
     #--TODO: quota check