Remove Response.Request field

client.go

@@ -88,7 +88,6 @@ func (c *Client) Do(req *Request) (*Response, error) {
 	if err := resp.read(conn); err != nil {
 		return nil, err
 	}
-	resp.Request = req
 	// Store connection state
 	resp.TLS = conn.ConnectionState()
 

response.go

@@ -21,9 +21,6 @@ type Response struct {
 	// Body contains the response body for successful responses.
 	Body io.ReadCloser
 
-	// Request is the request that was sent to obtain this response.
-	Request *Request
-
 	// TLS contains information about the TLS connection on which the response
 	// was received.
 	TLS tls.ConnectionState