`namespaceID` as a block field is probably redundent

[mtsitrin]

Currently, besides the DA's namespace param, which used for blob submission, we also have Namespace field in the block itself.

Seems redundant and unused

[mtsitrin]

@srene do u think it can be removed or we missing something?

[srene]

it do not see any reason why we need a namespace_id param in the block manager. for da submission it is used the namespace id param from da_config only.

[srene]

The namespaceid config parameter is as field used in the block manager, that is actually included in every block header. I would not remove it by now, since modifying header fields can be a critical update

[mtsitrin]

well we can leave it in the header type, just not fill it if it's unused