refactor: remove unnecessary mutex #8065

Job	Run time
test (x86_64-pc-windows-msvc, windows-latest, 1.61.0, --no-default-features, no-default)	5m 31s
test (x86_64-pc-windows-msvc, windows-latest, 1.61.0, --features api-all, api-all)	12m 54s
test (x86_64-pc-windows-msvc, windows-latest, 1.61.0, --features compression, all)	6m 53s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0, --no-default-features, no-default)	8m 54s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0, --features api-all, api-all)	10m 55s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0, --features compression, all)	6m 36s
test (x86_64-apple-darwin, macos-latest, 1.60.0, --no-default-features, no-default)	3m 30s
test (x86_64-apple-darwin, macos-latest, 1.60.0, --features api-all, api-all)	8m 5s
test (x86_64-apple-darwin, macos-latest, 1.60.0, --features compression, all)	4m 33s
	1h 7m 51s

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