Remove old unused justfile (#349) #185

Job	Run time
build-rust-windows	5m 33s
build-rust-ubuntu	2m 12s
build-guest-binaries / build-guest-binaries (windows-2022-debug)	4m 24s
build-guest-binaries / build-guest-binaries (windows-2022-release)	11m 29s
benchmarks / benchmark (hyperv, amd, release)	8m 0s
benchmarks / benchmark (hyperv, intel, release)	8m 7s
benchmarks / benchmark (mshv, amd, release)	4m 49s
benchmarks / benchmark (mshv, intel, release)	4m 57s
benchmarks / benchmark (mshv3, amd, release)	5m 0s
benchmarks / benchmark (mshv3, intel, release)	5m 5s
benchmarks / benchmark (kvm, amd, release)	5m 2s
benchmarks / benchmark (kvm, intel, release)	4m 54s
publish	10m 20s
cargo-publish / publish-hyperlight-packages	0s
	1h 19m 52s

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