Cleanup Code Related to JSON v1 v2 configuration

[mageddo]

What is expected

Remove a lot of code related to legacy configurations, keep v1 v2 support if I can keep that minimal and isolated from v3 evolution.

What is Happening

I consider too few people are using then and until v3, every time I change v2, v1 was affected.

Tasks

• Cleanup supporting classes related to config v1 v2
• Check if I can maintain them isolated, with no need to change when I change v3, so keep then, otherwise remove