Just disable the daemon processes so they do not start when the system is booted.
Or, better yet, just remove or move the daemon executables so they cannot be executive from any scripts (because the name has been changed).
For example, if
telnetd is located in
/usr/bin just rename it to
disabled_telnetd, kill the existing running process and you are done.
Of course, the most secure is to just remove those executables from the server altogether... End of story. Remove them, kill any running processes... system more secure
If you think you might need them again someday, move them to a backup server, or external disk or media and be happy.