Update Go newsletters (#271)

Author: hallabro

README.md

@@ -229,11 +229,8 @@ Thanks to all [contributors](https://github.com/zudochkin/awesome-newsletters/gr
 
 ### Go
 
-- [Go Newsletter](https://golangweekly.com/). A weekly newsletter about the Go programming language. [Archive](https://golangweekly.com/issues).
-- [Awesome Go Newsletter](https://go.libhunt.com/newsletter). A weekly overview of the most popular Go news, articles and libraries.
-- [Go Gazette](http://www.go-gazette.com/). Weekly curated blogs and tools for Golang seniors.
-- [GoNotícias](https://gonoticias.substack.com/). A weekly newsletter about the Go programming language in Portuguese.
-- [Gopherit!](https://gopherit.substack.com). Advanced and beginner tips, videos, and articles about Golang, bi-Weekly newsletter.
+- [Golang Weekly](https://golangweekly.com/). A weekly newsletter about the Go programming language. [Archive](https://golangweekly.com/issues).
+- [Awesome Go Weekly](https://go.libhunt.com/newsletter). A weekly overview of the most popular Go news, articles and libraries.
 
 ### R