Remove some `as` casts #2171

Job	Run time
Rustfmt (stable)	17s
Build and Test (ubuntu-latest, 1.70)	2m 21s
clippy_check (ubuntu-latest, stable)	25s
Build and Test (ubuntu-latest, 1.75)	2m 4s
clippy_check (ubuntu-latest, nightly)	37s
Build and Test (ubuntu-latest, 1.80)	1m 55s
clippy_check (windows-latest, stable)	1m 35s
Build and Test (ubuntu-latest, stable)	4m 26s
Build and Test (ubuntu-latest, beta)	1m 51s
clippy_check (windows-latest, nightly)	1m 50s
Build and Test (ubuntu-latest, nightly)	1m 42s
Build and Test (windows-latest, 1.70)	3m 24s
Build and Test (windows-latest, 1.75)	3m 12s
Build and Test (windows-latest, 1.80)	3m 10s
Build and Test (windows-latest, stable)	3m 53s
Build and Test (windows-latest, beta)	3m 6s
Build and Test (windows-latest, nightly)	3m 14s
Tests result	1s
	39m 3s

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