Cleanup for the new block layout code.
I've noticed that BlockChain and BlockSequence can be collapsed into a newtype of OrdList so I did just that.
Allocations go down slightly (0.2% for the CodeGen pass or so).
I've noticed that BlockChain and BlockSequence can be collapsed into a newtype of OrdList so I did just that.
Allocations go down slightly (0.2% for the CodeGen pass or so).