Requirement : Consider the consequences of disabling a trigger in the production environment during work hours. It is highly recommended to perform this during off-hours. Also, disable access to the application to non-administrators during the maintenance period.
In certain circumstances, we need to deactivate trigger temporary or permanently. But, if you open the trigger in Salesforce production environment, you will not see Edit and Delete button.
So, how to deactivate trigger in production? In short, deactivate the same trigger in sandbox and deploy it to production. You can deploy with Ant, Force.com IDE, or simple Change Set.
The other option is to keep the trigger active, but comment all the content. Although this is not ideal, but you can use the same concept to remove any logic in Apex Class.
Reference : https://help.salesforce.com/articleView?id=000327373&type=1&mode=1
