ci: delete old workflows #4162

Job	Run time
Build mlibc (x86_64, mlibc, gcc)	3m 47s
Build mlibc (x86_64, mlibc-static, gcc)	3m 13s
Build mlibc (x86_64, mlibc-shared, gcc)	3m 13s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	2m 57s
Build mlibc (x86_64, mlibc-headers-only, gcc)	1m 57s
Build mlibc (riscv64, mlibc, gcc)	3m 41s
Build mlibc (riscv64, mlibc-static, gcc)	4m 31s
Build mlibc (riscv64, mlibc-shared, gcc)	3m 3s
Compile sysdeps (dripos)	2m 17s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	2m 57s
Compile sysdeps (lemon)	2m 21s
Build mlibc (riscv64, mlibc-headers-only, gcc)	2m 1s
Compile sysdeps (aero)	2m 17s
Compile sysdeps (ironclad)	2m 16s
Build mlibc (aarch64, mlibc, gcc)	3m 58s
Compile sysdeps (lyre)	2m 17s
Build mlibc (aarch64, mlibc-static, gcc)	3m 23s
Compile sysdeps (keyronex)	2m 17s
Build mlibc (aarch64, mlibc-shared, gcc)	3m 32s
Compile sysdeps (managarm)	2m 36s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	3m 28s
Compile sysdeps (vinix)	2m 18s
Build mlibc (aarch64, mlibc-headers-only, gcc)	1m 59s
Compile sysdeps (astral)	2m 22s
Build mlibc (x86, mlibc, gcc)	3m 55s
Build mlibc (x86, mlibc-static, gcc)	3m 21s
Build mlibc (x86, mlibc-shared, gcc)	3m 7s
Build mlibc (x86, mlibc-ansi-only, gcc)	2m 54s
Build mlibc (x86, mlibc-headers-only, gcc)	1m 57s
Build mlibc (m68k, mlibc, gcc)	3m 31s
Build mlibc (m68k, mlibc-static, gcc)	3m 18s
Build mlibc (m68k, mlibc-shared, gcc)	3m 28s
Build mlibc (m68k, mlibc-ansi-only, gcc)	2m 43s
Build mlibc (m68k, mlibc-headers-only, gcc)	1m 55s
Build mlibc (x86_64, mlibc, clang)	3m 17s
	1h 42m 7s

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