MDL-40918 mod_lti: removed the 'launch' add_to_log call
MDL-40918 mod_lti: removed the 'launch' add_to_log call

This add_to_log call is unnecessary and does not need to be replaced with an event.
It is called whenever we view the external tool, which will trigger the view event.
There is no need for two events when this occurs.

dilawar/moodle