remover booker, that's overdosed

It also brings the problem of consolidating bookers over multiple
bookings. The amount of data is not justifying having it in an own
entity

pages/api/booking/[uuid]/index.ts

@@ -51,7 +51,6 @@ export default withSession(async function userHandler(
       booking.set(req.body)
       try {
         await booking.save()
-        await booking.populate('booker').execPopulate()
         res.status(200).json(booking.toJSON())
       } catch (error) {
         res.status(400).end(`Failed to save booking: ${error.message}`)