Remove unused function #289

Job	Run time
abi-dump-setup	1m 30s
Build lldb / Lit Tests (ubuntu-22.04)	2h 4m 54s
Test lld / Lit Tests (ubuntu-22.04)	1h 13m 8s
Build lldb / Lit Tests (windows-2019)	1m 57s
Test llvm,clang,libclc / Lit Tests (ubuntu-22.04)	2h 57m 11s
Test lld / Lit Tests (windows-2019)	2m 4s
Build lldb / Lit Tests (macOS-latest)	1h 9m 40s
Test llvm,clang,libclc / Lit Tests (windows-2019)	1m 58s
Test lld / Lit Tests (macOS-latest)	43m 8s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	2h 13m 59s
abi-dump (build-baseline)	32m 55s
abi-dump (build-latest)	33m 52s
abi-compare	32s
	11h 36m 48s

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