code: @Override
      public DeleteRouteTableResult deleteRouteTable(DeleteRouteTableRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteRouteTable(request);
      }
docs: <p>
  Deletes the specified route table. You must disassociate the route table from any subnets before you can delete
  it. You can't delete the main route table.
  </p>
  
  @param deleteRouteTableRequest
  @return Result of the DeleteRouteTable operation returned by the service.
  @sample AmazonEC2.DeleteRouteTable
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DeleteRouteTable" target="_top">AWS API
  Documentation</a>