fix: remove signature assoc type from tx response trait #4430

Job	Run time
doctest	2m 1s
test ubuntu-latest stable --no-default-features	2m 6s
test ubuntu-latest stable	1m 45s
cfg-check	23s
test ubuntu-latest stable --all-features	2m 30s
test ubuntu-latest nightly --no-default-features	1m 15s
check no_std	19s
test ubuntu-latest nightly	1m 9s
test ubuntu-latest nightly --all-features	2m 21s
clippy	1m 5s
test ubuntu-latest 1.79 --no-default-features	1m 6s
docs	57s
test ubuntu-latest 1.79	1m 12s
test windows-latest stable --no-default-features	4m 24s
feature-checks	3m 55s
fmt	11s
test windows-latest stable	4m 31s
test windows-latest stable --all-features	5m 31s
wasm-unknown	1m 0s
wasm-wasi	1m 21s
test windows-latest nightly --no-default-features	3m 11s
test windows-latest nightly	3m 22s
test windows-latest nightly --all-features	4m 43s
test windows-latest 1.79 --no-default-features	2m 36s
test windows-latest 1.79	2m 42s
	55m 36s

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