fix(clippy): Fix `needless_return` lint. (#405) #934

Job	Run time
Minimal versions check (ubuntu-latest)	21s
Build & Test (fancy, 1.70.0, ubuntu-latest)	50s
Minimal versions check (macOS-latest)	20s
Check fmt & build docs	33s
Build & Test (fancy, 1.70.0, macOS-latest)	43s
Miri	4m 54s
Minimal versions check (windows-latest)	40s
Build & Test (fancy, 1.70.0, windows-latest)	1m 22s
Check Wasm build	12s
Build & Test (fancy, stable, ubuntu-latest)	47s
Build & Test (fancy, stable, macOS-latest)	50s
Build & Test (fancy, stable, windows-latest)	1m 28s
Build & Test (syntect-highlighter, stable, ubuntu-latest)	54s
Build & Test (syntect-highlighter, stable, macOS-latest)	48s
Build & Test (syntect-highlighter, stable, windows-latest)	2m 41s
	17m 23s

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