Please follow the below mentioned from build 10600 and above:
1. Go to Admin > Page Scripts > click 'New Rule'. Give the rule a suitable name.
2. Define the conditions as per your requirement.
3. Under Actions click 'Write Custom Script' and paste the code below:
$CS.findElement("#eventNotificationLink").parent().children().hide();
4. Save the script and rule.
5. Refresh the page and the icon will be hidden: