How to stop getting macOS beta updates?
In Software update preferences, click on details under the gear icon and un-enroll there. This stops beta updates.

Emails and feedback assistant features are still there which need to be removed after signing into 


https://idmsa.apple.com/IDMSWebAuth/login.html?appIdKey=4b98a8e6a3a3ce265b93c90207c442b53c45a1afa9ff1dc9bde8bb6928078d3b&amp;path=%2F%2Fbetaprogram%2Flogin_to_unenroll&amp;rv=2#


More details: https://beta.apple.com/sp/betaprogram/unenroll