curl --request DELETE \
  --url https://api.devin.ai/v3beta1/enterprise/organizations/{org_id}/members/idp-groups/{idp_group_name}

{
  "idp_group_name": "<string>",
  "role_assignments": [
    {
      "role": {
        "role_name": "<string>",
        "role_id": "<string>",
        "role_type": "enterprise"
      },
      "org_id": "<string>"
    }
  ]
}