removal of notices for WPMU DEV in admin panel

i installed bbpress recently in a client's site, and i do not want him to get confused by looking at wpmu messages in the admin panel.
I'd like to turn off ALL NOTICES in the dashboard relating to ANY thing - such as removal of new updates available, or 'Get started with WPMU DEV' etc etc.
I looked in the bbpress code to comment out messages, but not sure where they are or whether whenever i update bbpress I shall be overwriting these changes.
If there is a dismiss this message or dismiss these messages button i could not find it. Please explain your procedure for getting rid of these messages thank you in advance. ed