-- set `group_concat_max_len`
SET @@session.group_concat_max_len = @@global.max_allowed_packet;
-- select all the triggers and build the `DROP TRIGGER` SQL
-- replace <your_schema> with your schema name (e.g. your database name)
SELECT GROUP_CONCAT(sql_string SEPARATOR '\n')
FROM ( SELECT CONCAT('DROP TRIGGER IF EXISTS `', TRIGGER_NAME, '`;') AS sql_string,'1' FROM information_schema.TRIGGERS WHERE TRIGGER_SCHEMA = '<your_schema>' ) AS sql_strings
GROUP BY '1';
-- example result:
-- DROP TRIGGER IF EXISTS `trigger1`;
-- DROP TRIGGER IF EXISTS `trigger2`;
-- (...)