Remove obsolete badges

Author: markdingo

README.md

@@ -29,8 +29,6 @@ higher level Marshal() and Unmarshal() functions.
 
 [![Build Status](https://github.com/markdingo/netstring/actions/workflows/go.yml/badge.svg)](https://github.com/markdingo/netstring/actions/workflows/go.yml)
 [![codecov](https://codecov.io/gh/markdingo/netstring/branch/main/graph/badge.svg)](https://codecov.io/gh/markdingo/netstring)
-[![CodeQL](https://github.com/markdingo/netstring/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/markdingo/netstring/actions/workflows/codeql-analysis.yml)
-[![Go Report Card](https://goreportcard.com/badge/github.com/markdingo/netstring)](https://goreportcard.com/report/github.com/markdingo/netstring)
 [![Go Reference](https://pkg.go.dev/badge/github.com/markdingo/netstring.svg)](https://pkg.go.dev/github.com/markdingo/netstring)
 
 ## Background