remove known issues file (belongs in `EESSI/software-layer` repo) #2

Job	Run time
check_missing (ubuntu-24.04, x86_64/amd/zen2)	2m 12s
check_missing (ubuntu-24.04-arm, aarch64/neoverse_n1)	3m 33s
check_missing (ubuntu-24.04, x86_64/intel/cascadelake)	1m 46s
check_missing (ubuntu-24.04-arm, aarch64/nvidia/grace)	3m 31s
check_missing (ubuntu-24.04-arm, aarch64/neoverse_v1)	2m 11s
check_missing (ubuntu-24.04, x86_64/intel/haswell)	45s
check_missing (ubuntu-24.04, x86_64/intel/skylake_avx512)	1m 34s
check_missing (ubuntu-24.04-arm, aarch64/generic)	3m 29s
check_missing (ubuntu-24.04, x86_64/amd/zen3)	37s
check_missing (ubuntu-24.04, x86_64/intel/icelake)	35s
check_missing (ubuntu-24.04, x86_64/intel/sapphirerapids)	45s
check_missing (ubuntu-24.04, x86_64/generic)	57s
check_missing (ubuntu-24.04, x86_64/amd/zen4)	58s
	22m 53s

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