[protocol spec] Remove a calculation of cv in \crossref{orcharddummynotes} that is not applicable to Orchard (since cv for an Action Description depends on both the spent and output notes).
[protocol spec] Remove a calculation of cv in \crossref{orcharddummynotes}
that is not applicable to Orchard (since cv for an Action Description
depends on both the spent and output notes).

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

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