Remove some `as` casts #2173

Job	Run time
Rustfmt (stable)	11s
Build and Test (ubuntu-latest, 1.70)	23s
Build and Test (ubuntu-latest, 1.75)	23s
clippy_check (ubuntu-latest, stable)	17s
Build and Test (ubuntu-latest, 1.80)	20s
clippy_check (ubuntu-latest, nightly)	19s
Build and Test (ubuntu-latest, stable)	35s
clippy_check (windows-latest, stable)	2m 2s
Build and Test (ubuntu-latest, beta)	23s
clippy_check (windows-latest, nightly)	1m 2s
Build and Test (ubuntu-latest, nightly)	23s
Build and Test (windows-latest, 1.70)	23s
Build and Test (windows-latest, 1.75)	21s
Build and Test (windows-latest, 1.80)	20s
Build and Test (windows-latest, stable)	27s
Build and Test (windows-latest, beta)	21s
Build and Test (windows-latest, nightly)	21s
Tests result	1s
	8m 32s

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