I want to disable few notification templates from triggering the emails from the LMS system.
Learning Management System
To deactivate the notifications templates from triggering email you need to remove the Subject and Body details from the template (I.e. Make them Blank)
System Admin -> Configuration -> Notifications Template -> Search for the template you need to deactivate -> Goto Messages Tab -> Blank out the Body and Subject and click on Apply Changes.
NOTE: Copy the Template's Subject and Body in a notepad and store it on your end as you can just copy the same if you want to use it in future.
Stop email from triggering for particular template
Disable emails for a template , KBA , LOD-SF-LMS-NOT , Notifications , Problem