Opengov cleaning leftovers

[ironoa]

#2563 (comment)

[ironoa]

Strategy agreed: complete removal, no backward compatibility ensured

[ironoa]

Not addressed yet:

• https://github.com/search?q=repo%3Aw3f%2F1k-validators-be%20OpenGov&type=code

[wpank]

#2859

can be closed with this

[ironoa]

#2859

can be closed with this

can you do something similar to what asked here ?

[ironoa]

Leftovers found in the db also:
(Candidate entry)