code: func (g *Gitlab) RemoveProjectDeployKey(id, keyId string) (*ResponseMeta, error) {
  	u := g.ResourceUrl(ProjectDeployKeyApiPath, map[string]string{
  		":id":     id,
  		":key_id": keyId,
  	})
  
  	var err error
  
  	_, meta, err := g.buildAndExecRequest("DELETE", u.String(), nil)
  
  	return meta, err
  }
docs: /*
  Remove deploy key from project
  
      DELETE /projects/:id/keys/:key_id
  
  Parameters:
  
      id    The ID of a project
      keyId The ID of a key
  
  */