AWS SDK DeleteDBInstanceで を使用する

    /**
     * Deletes a DB instance asynchronously.
     *
     * @param instanceId the identifier of the DB instance to be deleted
     * @return a {@link CompletableFuture} that completes when the DB instance has been deleted
     */
    public CompletableFuture<Void> deleteDBInstanceAsync(String instanceId) {
        DeleteDbInstanceRequest request = DeleteDbInstanceRequest.builder()
                .dbInstanceIdentifier(instanceId)
                .skipFinalSnapshot(true)
                .build();

        return getAsyncClient().deleteDBInstance(request)
                .thenAccept(response -> System.out.println("🗑️ Deleting DB Instance: " + instanceId));
    }