Rudder

Hi

When we remove a technique from NCF Builder (Delete button), the technique is still present on the Reference Technique library view (Administration / Technique).
How can we clean old techniques ? (remove and git ?)

Update1 [FAR]: for now, the workaround for deleteing an ncf technique is to:
- 1/ delete the technique from ncf-builder
- 2/ goto rudder page "Administration -> Technique", click on the technique in the tree, scroll to bottom of the page and [delete] the technique.

Update2 [FAR]: given feedback from #5670, the less surprising behavior when deleting a technique from ncf-builder would be to:

- remove the technique from the list of active technique
- disable but don't delete directives based on the technique.