Removes Google calendar scope (#871)

Removes https://www.googleapis.com/auth/calendar scope from Google Calendar as Google will not approve the integration with it requested. Cal.com does not currently utilize this permission either as shown in /pages/api/integrations/googlecalendar/add.ts

Co-authored-by: Peer Richelsen <peeroke@gmail.com>
Co-authored-by: Alex van Andel <me@alexvanandel.com>