Delete the consensus rule in \crossref{transactions} that required checking that each intermediate Merkle root of the note commitment tree is not ⊥. Checking this rule would have imposed a significant performance penalty, since intermediate roots do not otherwise need to be computed.
Delete the consensus rule in \crossref{transactions} that required checking that each intermediate
Merkle root of the note commitment tree is not ⊥. Checking this rule would have imposed a
significant performance penalty, since intermediate roots do not otherwise need to be computed.

Signed-off-by: Daira Hopwood <cd7d43d5556a38ce626d53826fddc46adc597539@jacaranda.org>

zcash/zips,zcash/zips,zcash/zips,zcash/zips