278 - removed deprecated apis env vars and related code/docs

[mmacai]

Description

Closes #278

• removed deprecated and unused code
• fixed some npm audit issues

What to look out for

• pretty much take a look at the changelog and removed stuff
• run all test suites - unit, smoke, integration, cypress - everything should be green

Process

The goal is to improve not only the code in this PR but also our skills! The "rules":

• The review is considered "done" as soon as all reviewers have added their review, and all their comments have been addressed.
• For knowledge-sharing reviews, each reviewer should "approve" the PR after studying its content.
• After the approval, the merge is concluded by the developer.

Have fun!