Don't spam with failed to delete item alerts
When calendar item is not found in the remote calendar, don't alert with the error messages about that if there - there's no reason to alert users about it if even is already gone.
Close-Bug: #419713
When calendar item is not found in the remote calendar, don't alert with the error messages about that if there - there's no reason to alert users about it if even is already gone.
Close-Bug: #419713