Fix some clippy warnings on Windows (#363) #170

Job	Run time
aarch64-apple-darwin	43s
aarch64-apple-darwin force-inprocess	1m 1s
aarch64-apple-darwin async	49s
x86_64-apple-darwin	2m 3s
x86_64-apple-darwin force-inprocess	1m 27s
x86_64-apple-darwin async	2m 4s
x86_64-unknown-linux-gnu	55s
x86_64-unknown-linux-gnu force-inprocess	52s
x86_64-unknown-linux-gnu async	55s
x86_64-pc-windows-msvc	2m 46s
x86_64-pc-windows-msvc force-inprocess	3m 17s
x86_64-pc-windows-msvc async	3m 7s
i686-pc-windows-msvc	3m 7s
i686-pc-windows-msvc force-inprocess	1m 38s
i686-pc-windows-msvc async	2m 47s
x86_64-pc-windows-msvc windows-shared-memory-equality	3m 32s
i686-pc-windows-msvc windows-shared-memory-equality	2m 41s
x86_64-unknown-linux-gnu memfd	53s
Result	1s
	34m 38s

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