There are two components to SELinux alerting mechanisms, both of which are documented.

For GUI notifications open the sealert app and disable alerts. For journal/syslog reports disable the setroubleshoot daemon dispatch plugin for auditd:

    sed -i 's/active.=.yes/active = no/' /etc/audit/plugins.d/sedispatch.conf
    service auditd restart

You can also uninstall the setroublshoot-server package completely, and all AVC denials will continue be reported separately outside of the journal.