refactor: remove `return`s that are unnecessary #254

Job	Run time
cargo-publish	0s
Tests (macos-latest, stable)	44s
Tests (macos-latest, beta)	1m 1s
Tests (macos-latest, nightly)	1m 7s
Tests (windows-latest, stable)	2m 9s
Tests (windows-latest, beta)	1m 20s
Tests (windows-latest, nightly)	1m 11s
Tests (ubuntu-latest, stable)	46s
Tests (ubuntu-latest, beta)	35s
Tests (ubuntu-latest, nightly)	28s
	9m 21s

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