Step 1: Make sure you are on a paid plan of Cogsworth. This will unlock this feature.
Step 2: Head to your name in the top right > settings > adjusting the colour & upload your own logo.
NOTE: Please make sure your logo is not too large - ideal dimensions are 220 x 70 px
This will ensure the logo is optimal for the web and for emails
Step 3: Head over to notifications and edit the template to remove the desired text.
The below video describes how you can adjust your custom notifications.