Remove unused import. #53

Job	Run time
build (21, adopt, macos-latest)	6m 0s
build (21, adopt, ubuntu-latest)	3m 57s
build (21, adopt, windows-latest)	4m 11s
build (21, adopt-openj9, macos-latest)	6m 33s
build (21, adopt-openj9, ubuntu-latest)	4m 7s
build (21, adopt-openj9, windows-latest)	5m 25s
build (21, corretto, macos-latest)	5m 55s
build (21, corretto, ubuntu-latest)	4m 34s
build (21, corretto, windows-latest)	5m 6s
build (21, dragonwell, ubuntu-latest)	4m 29s
build (21, dragonwell, windows-latest)	5m 4s
build (21, liberica, macos-latest)	5m 49s
build (21, liberica, ubuntu-latest)	4m 14s
build (21, liberica, windows-latest)	5m 8s
build (21, microsoft, ubuntu-latest)	4m 7s
build (21, microsoft, windows-latest)	5m 1s
build (21, temurin, macos-latest)	6m 34s
build (21, temurin, ubuntu-latest)	3m 52s
build (21, temurin, windows-latest)	5m 22s
build (21, zulu, macos-latest)	6m 1s
build (21, zulu, ubuntu-latest)	3m 40s
build (21, zulu, windows-latest)	4m 6s
	1h 49m 15s

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