fix(dockerfile): remove useless CMD #1919

Job	Run time
fetch-version / fetch-version	43s
build-dev-minimal / build-and-test	4m 43s
build-dev / build-and-test	14m 25s
build-dev-packages / build-modern-bpf-skeleton	10m 35s
build-dev-packages / build-wasm-package	9m 58s
build-dev-packages / build-musl-package	51m 12s
build-dev-packages / build-packages	35m 51s
check-engine-checksum	6s
check-engine-version	4s
test-dev-packages (static) / test-packages	1m 54s
test-dev-packages / test-packages	3m 22s
	2h 12m 53s

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