Are you interested on getting acknowledgement of these events or do you want to get rid of them?
Get rid of the reports of deleted cookies on servers (roaming profiles) and workstations. I'm really not that interested and they can either be reported but automatically acknowledged (preference) or not reported at all.
VSE 8.8 (10 workstations)
EPO 4.6 (1 server)
I've been reviewing events sent by managed computers but cannot find an event for cookie deletion. What kind of report are tou receiving?