clippy: remove useless_vec #48

Job	Run time
Build and test for 1.84.1 on ubuntu-latest	20s
Build and test for 1.87 on ubuntu-latest	20s
Build and test for stable on ubuntu-latest	17s
Build and test for 1.84.1 on macos-latest	20s
Build and test for stable on macos-latest	15s
Build and test for 1.87 on windows-latest	43s
Build and test for stable on windows-latest	2m 8s
Build and test for 1.87 on macos-latest	16s
Style checks for 1.87 on ubuntu-latest	22s
Build and test for 1.84.1 on windows-latest	1m 25s
Style checks for 1.84.1 on windows-latest	53s
Style checks for stable on macos-latest	21s
Style checks for stable on ubuntu-latest	18s
Style checks for 1.84.1 on macos-latest	18s
Style checks for 1.84.1 on ubuntu-latest	19s
Style checks for stable on windows-latest	46s
Style checks for 1.87 on macos-latest	21s
Style checks for 1.87 on windows-latest	58s
	10m 40s

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