remove the notification that shows when he

remove the notification that shows when he add a user on the webex teams space

when he add a user in the Space and this user already has a Webex account it will be added by the name “you added (person’s name)”, but if this user doesn’t have a Webex account it will be added by email “you added (person’s email) in the space”. 
customer would like to remove this notification from the sapce.