How to Deactivate Notifications
If you do not wish to receive notifications from the system, you can deactivate the e-mail option in the user settings of your profile.
Click on the username/ usericon in the top-right corner of the black menu bar and select My profile from the menu that appears.
Once on the main page of your profile scroll down to the option Notification and set the radio button for None:
Click SAVE at the bottom of the page to finish the process.