Delete links for meetups that are no longer active (#5412)

README.md

@@ -3568,7 +3568,6 @@ _Where to discover new Go libraries._
 - [Berlin Golang](https://www.meetup.com/golang-users-berlin/)
 - [Brisbane Gophers](https://www.meetup.com/Brisbane-Golang-Meetup/)
 - [Bärner Go Meetup - Berne, Switzerland](https://www.meetup.com/berner-go-meetup/)
-- [Canberra Gophers](https://www.meetup.com/Canberra-Gophers/)
 - [Go Language NYC](https://www.meetup.com/golanguagenewyork/)
 - [Go London User Group](https://www.meetup.com/Go-London-User-Group/)
 - [Go Remote Meetup](https://www.meetup.com/Go-Remote-Meetup/)
@@ -3596,7 +3595,6 @@ _Where to discover new Go libraries._
 - [Golang Hamburg - Germany](https://www.meetup.com/Go-User-Group-Hamburg/)
 - [Golang Israel](https://www.meetup.com/Go-Israel/)
 - [Golang Kathmandu](https://www.meetup.com/Golang-Kathmandu/)
-- [Golang Korea](https://www.meetup.com/GDG-Golang-Korea/)
 - [Golang Lima - Peru](https://www.meetup.com/Golang-Peru/)
 - [Golang Lyon](https://www.meetup.com/Golang-Lyon/)
 - [Golang Marseille](https://www.meetup.com/fr-FR/Golang-Marseille/)