DROP TRIGGER name ON table
The name of the trigger you wish to remove.
The name of the table the trigger is on.
Use the DROP TRIGGER command to remove a trigger from the database. All references to the trigger are removed when you issue this command. You must be the owner of trigger in order to drop it.
The following command removes the sync_authors_books trigger from the authors table, in the booktown database:
booktown=# DROP TRIGGER sync_authors_books ON authors; DROP