Remove go report card

Author: zquestz

README.md

@@ -1,7 +1,6 @@
 bchd
 ====
 [![Build Status](https://github.com/gcash/bchd/actions/workflows/main.yml/badge.svg?branch=master)](https://github.com/gcash/bchd/actions/workflows/main.yml)
-[![Go Report Card](https://goreportcard.com/badge/github.com/gcash/bchd)](https://goreportcard.com/report/github.com/gcash/bchd)
 [![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
 [![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/gcash/bchd)