Remove namespace ID from header

[Manav-Aggarwal]

Closes: #690.

[codecov-commenter]

Codecov Report

Base: 55.07% // Head: 55.07% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (e1a4a81) compared to base (a1643e1).
Patch coverage: 100.00% of modified lines in pull request are covered.

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Additional details and impacted files

@@ Coverage Diff @@## main #718 +/- ##
=======================================
Coverage 55.07% 55.07% =======================================
Files 52 52 Lines 9851 9792 -59 =======================================
- Hits 5425 5393 -32 + Misses 3618 3599 -19 + Partials 808 800 -8 

Impacted Files	Coverage Δ
state/executor.go	64.73% <ø> (-0.09%)	⬇️
types/header.go	7.59% <ø> (ø)
types/serialization.go	75.41% <ø> (+1.41%)	⬆️
types/pb/rollkit/rollkit.pb.go	40.39% <100.00%> (-0.15%)	⬇️
rpc/json/ws.go	58.73% <0.00%> (-3.18%)	⬇️
block/manager.go	63.12% <0.00%> (-0.68%)	⬇️

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[nashqueue]

Does this close the whole epic #579 ?

[tzdybal]

Does this close the whole epic #579 ?

No. It's 3rd out of 9 tasks, and we probably will create even more. Fixed in the first comment.