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chore: Replace type related to future with standard library #1071

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Job	Run time
check-stable	14s
check-docs	13s
cargo-hack	19s
check-msrv	1m 28s
cargo-deny check	18s
test-versions (stable)	34s
style	6s
test-versions (beta)	40s
test-versions (nightly)	36s
test-msrv	0s
	4m 28s