AWS SDK で deleteFleet を使用する

    /**
     * Deletes a fleet based on the provided fleet ID.
     *
     * @param fleetId the ID of the fleet to be deleted
     */
    public CompletableFuture<Void> deleteFleetAsync(String fleetId) {
        DeleteFleetRequest request = DeleteFleetRequest.builder()
                .fleetId(fleetId)
                .build();

        return getAsyncClient().deleteFleet(request)
                .handle((response, exception) -> {
                    if (exception != null) {
                        Throwable cause = exception.getCause() != null ? exception.getCause() : exception;
                        if (cause instanceof ResourceNotFoundException) {
                            throw (ResourceNotFoundException) cause;
                        }
                        throw new RuntimeException("Failed to delete the fleet: " + cause);
                    }
                    logger.info("{} was successfully deleted", fleetId);
                    return null;
                });
    }

/**
 * Deletes a fleet based on the provided fleet ID.
 *
 * @param fleetId the ID of the fleet to be deleted
 */
suspend fun deleteFleet(fleetIdVal: String) {
    val request = DeleteFleetRequest {
        fleetId = fleetIdVal
    }

    IotFleetWiseClient.fromEnvironment { region = "us-east-1" }.use { fleetwiseClient ->
        fleetwiseClient.deleteFleet(request)
        println(" $fleetIdVal was successfully deleted")
    }
}