There are two ways to prevent trigger from firing.
1) Drop Trigger
Example:
DROP TRIGGER TriggerName
GO
2) Disable Trigger
DML trigger can be disabled two ways. Using ALETER TABLE statement or use DISABLE TRIGGER. I prefer DISABLE TRIGGER statement.
Syntax:
DISABLE TRIGGER { [ schema . ] trigger_name
[ ,...n ] | ALL }
ON { OBJECT_NAME | DATABASE | ALL SERVER } [ ; ]
Example:
DISABLE TRIGGER TriggerName ON TableName
Reference : Pinal Dave (https://blog.sqlauthority.com)