Remove unused function

go/fake-http/fake-http.go

	RandomDelay time.Duration `yaml:"randomDelay"`
}
func (resp Response) String() string {
	buf := new(bytes.Buffer)
	fmt.Fprintf(buf, "%s %s\r\n", resp.Method, resp.Path)
	for _, header := range resp.Headers {
		fmt.Fprintf(buf, "%s: %s\r\n", header.Name, header.Value)
	}
	fmt.Fprintf(buf, "\r\n%s", resp.Body)
	return buf.String()
}
// AsHTTP returns a http.Response representation.
func (resp Response) AsHTTP() *http.Response {
	headers := make(map[string][]string)