Remove ids constraint on delete relationship via CUD

[stfnzl]

Deletions no longer require specifying the relationship IDs on "from" and "to" enabling the possibility to remove all relationships from or to nodes with specific labels.

[ali-ince]

Thanks for raising this PR @stfnzl. However, I think this is a bit of risky change on the product that I would like to learn more about the use case. Could you please elaborate a bit on your use case and why you need this change?

[stfnzl]

Hi @ali-ince.

Imagine you have a kafka topic with the following structure:

{ "items": ["foo", "bar", "baz"] }

The goal is to synk these items into neo4j as nodes with a certain label, but any nodes not included needs to be deleted.
The idea is to have a kafka stream that produces "node delete" and then "node create" via a flatmap on "items".
The implemented workaround is to add a dummy property on the nodes and use that as "id".