Apply suggestions from code review #2594

Job	Run time
Build target wasm32-wasi	4m 16s
Bitrot check	4m 34s
Latest build on ubuntu-latest	1m 59s
Latest build on windows-latest	3m 45s
Test on ubuntu-latest	13m 10s
Test on ubuntu-latest with --features orchard	14m 5s
Clippy (MSRV)	5m 50s
Test on ubuntu-latest with --features unstable-nu6	13m 46s
Test on ubuntu-latest with --features zfuture	13m 39s
Latest build on macOS-latest	2m 49s
Test on windows-latest	18m 7s
Test on windows-latest with --features orchard	18m 19s
Clippy (beta)	17s
Test on windows-latest with --features unstable-nu6	17m 55s
Code coverage	21m 21s
Test on windows-latest with --features zfuture	18m 13s
Intra-doc links	5m 27s
Test on macOS-latest	21m 58s
Test on macOS-latest with --features orchard	21m 18s
Rustfmt	11s
protobuf consistency	4m 28s
UUID validity	5s
	3h 45m 32s

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