code: def ApprovalRevokeRaw(aff4_path, token):
    
    try:
      urn = rdf_client.ClientURN(aff4_path)
    except type_info.TypeValueError:
      urn = rdfvalue.RDFURN(aff4_path)
  
    approval_urn = aff4.ROOT_URN.Add("ACL").Add(urn.Path()).Add(
        token.username).Add(utils.EncodeReasonString(token.reason))
  
    super_token = access_control.ACLToken(username="raw-approval-superuser")
    super_token.supervisor = True
  
    approval_request = aff4.FACTORY.Open(
        approval_urn, mode="rw", token=super_token)
    approval_request.DeleteAttribute(approval_request.Schema.APPROVER)
    approval_request.Close()
docs: Revokes an approval for a given token.
  
    This method requires raw datastore access to manipulate approvals directly.
  
    Args:
      aff4_path: The aff4_path or client id the approval should be created for.
      token: The token that should be revoked.