psql: how to turn off context messages at raise notice
The solution :
As write – dezso Feb 17 '15 at 14:56, using \set VERBOSITYE 'terse' is the right way.
I've to add this option in my scripts using psql :
psql --dbname=DB_production --VERBOSITY=terse

But, I can't understand why on others instances, servers, environments, I haven't to do this.