doc: remove david-dm from README (nodejs#927)

Author: renbaoshuo

README.md

@@ -4,8 +4,6 @@ citgm is a simple tool for pulling down an arbitrary module from npm and testing
 it using a specific version of the node runtime.
 
 [![Build Status](https://github.com/nodejs/citgm/workflows/Node.js%20CI/badge.svg?branch=main)](https://github.com/nodejs/citgm/actions?query=workflow%3A%22Node.js+CI%22)
-[![dependencies Status](https://david-dm.org/nodejs/citgm/status.svg)](https://david-dm.org/nodejs/citgm)
-[![devDependencies Status](https://david-dm.org/nodejs/citgm/dev-status.svg)](https://david-dm.org/nodejs/citgm?type=dev)
 
 The Node.js project uses citgm to smoke test our releases and controversial
 changes. The Jenkins job that utilizes citgm can be found