Unable to delete SNMP monitor

Unable to delete SNMP monitor

Under the 12100 build I can't find an option to delete a few SNMP custom monitors that I created with a testing purpose.
I'm not trying to remove the monitor-template association, I need to delete the custom monitor from the list.
As you can see from the screenshot, under "Configuration", "Monitors", "Performance Monitor" there's no way to delete the custom-defined ones (the two "F5 device" ones). By the way, there's also no options to easily search them: there are hundreds, a search function should be there by default.
Thanks,

Marco
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