Remove signature.v parity before calculating tx hash #2869

Job	Run time
doctest	1m 20s
docs	1m 9s
cfg-check	35s
clippy	35s
feature-checks	2m 47s
fmt	16s
no-std	26s
wasm-unknown	48s
test ubuntu-latest stable --no-default-features	1m 45s
wasm-wasi	1m 3s
test ubuntu-latest stable	1m 20s
test ubuntu-latest nightly --no-default-features	1m 22s
test ubuntu-latest nightly	1m 16s
test ubuntu-latest 1.76 --no-default-features	1m 0s
test ubuntu-latest 1.76	35s
test windows-latest stable --no-default-features	3m 39s
test windows-latest stable	3m 18s
test windows-latest nightly --no-default-features	3m 25s
test windows-latest nightly	3m 37s
test windows-latest 1.76 --no-default-features	4m 7s
test windows-latest 1.76	1m 57s
	36m 20s

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