Remove atomic sub load #295

Job	Run time
abi-dump-setup	1m 56s
Test llvm,clang,libclc / Lit Tests (ubuntu-22.04)	2h 54m 13s
Test lld / Lit Tests (ubuntu-22.04)	1h 7m 10s
Test llvm,clang,libclc / Lit Tests (windows-2019)	2m 18s
Build lldb / Lit Tests (ubuntu-22.04)	2h 6m 37s
Test lld / Lit Tests (windows-2019)	2m 25s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	2h 24m 58s
Build lldb / Lit Tests (windows-2019)	2m 12s
Test lld / Lit Tests (macOS-latest)	45m 17s
Build lldb / Lit Tests (macOS-latest)	1h 20m 46s
abi-dump (build-baseline)	1s
abi-dump (build-latest)	1s
abi-compare	0s
	10h 47m 54s

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