[lld] [ELF] Eliminate symbols demoted due to /DISCARD/ discarded sections (PR #85167)

[Peter Smith via llvm-commits]

https://github.com/smithp35 approved this pull request.

LGTM. I agree that if the symbols from discarding the section are unreferenced then removing them lowers the risk of downstream ELF processing tools not accepting the undefined symbols.






https://github.com/llvm/llvm-project/pull/85167