Avoid building outdated branches

[stefano-ottolenghi]

Currently drivers supported versions are 4.4 and 5.x. Is there any reason why we should keep building old versions @recrwplay ? As far as I know, they will stay online even if we stop building them explicitly, as we don't delete old versions.

[neo4j-docops-agent]

This PR includes documentation updates
View the updated docs at https://neo4j-docs-drivers-462.surge.sh

[recrwplay]

It's a good question. Versions back to 4.0 are listed as compatible with 4.4 LTS on https://neo4j.com/developer/kb/neo4j-supported-versions/ but I don't now whether that in itself creates a requirement for the docs for these versions to be published alongside current and supported versions.

I don't think it would be a problem if they were removed from the version selector but still available (which they would be). Anyone already using an older version who wants to use the docs could probably get to the correct URL. This change would remove 4.2 and 4.3 from the version selector from each driver, and earlier versions would be available as they are now (ie published as the single 'Driver manual').

Docs for those earlier versions can be accessed from the links in https://neo4j.com/docs/reference/docs-archive/#_neo4j_drivers