aucpace: fix lints #136

Job	Run time
build (1.61, thumbv7em-none-eabi)	5m 6s
test (1.61)	5m 34s
build (stable, thumbv7em-none-eabi)	23s
test (stable)	31s
build (stable, wasm32-unknown-unknown)	19s
build (1.61, wasm32-unknown-unknown)	5m 14s
	17m 7s

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