Your guest will not be notified of your action.
Follow these steps to delete the proposals from FreeBusy Open Poll Sidebar without accepting or declining them. Your guest will not receive any notification if you ignore the proposal.
Step 1 : Go to FreeBusy.io
Step 2: Open FreeBusy Pending poll sidebar by clicking bell icon
Step 3: Click "Ignore" on proposal you want to delete without notifying the guest.
That's it. It is that easy!