remove all bill related stuff

pages/admin/bookings/[uuid]/index.tsx

@@ -1,6 +1,5 @@
 import React, { useEffect, useState } from 'react'
 import { useRouter } from 'next/router'
-import Link from 'next/link'
 import Calendar from '../../../../components/calendar'
 import { getServerSideBooking } from '../../../../lib/getServerSideProps'
 import { IBooking } from '../../../../db/booking'
@@ -13,7 +12,6 @@ import withAuth from '../../../../helpers/withAuth'
 export const getServerSideProps = getServerSideBooking
 
 function ShowBookingAdmin({ booking: bookingProp }: { booking: IBooking }) {
-  const router = useRouter()
   const [booking, setBooking] = useState(bookingProp)
   const [storingBooking, setStoringBooking] = useState(false)
   const [storingBookingError, setStoringBookingError] = useState(null)
@@ -64,9 +62,6 @@ function ShowBookingAdmin({ booking: bookingProp }: { booking: IBooking }) {
         >
           Buchung Abweisen
         </button>
-        <Link href={`${router.asPath}/bill`} className="btn btn-gray">
-          Rechnung
-        </Link>
       </div>
     </>
   )