wgpu: fix clippy #45

Job	Run time
xtask test & lint	1m 59s
lint (cargo-gpu)	7m 33s
test (ubuntu-24.04, cargo-gpu)	8m 35s
lint (spirv-builder)	6m 5s
test (windows-2022, spirv-builder)	9m 43s
test (macOS-latest, spirv-builder)	6m 5s
test (windows-2022, cargo-gpu)	13m 32s
test (macOS-latest, cargo-gpu)	7m 20s
test (ubuntu-24.04, spirv-builder)	6m 41s
test_success	2s
	1h 7m 35s

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