To remove an unwanted booking from your Bookings section or from your Calendar, simply head to your Bookings section and click on the booking you wish to cancel. 

Then, hover over the Contact section next to the paperwork folder you'll see a little "..." more icon. Click that menu and you'll see a "Cancel Booking" option - then you can cancel and remove them!

This will Cancel the booking and update the status. This action is separate to Deleting a booking, which you can then do after Cancelling, if you want to remove it completely.