[llvm] Revert "Add --offoading option to llvm-readobj (#143342)" (PR #161606)

[David Salinas via llvm-commits]

david-salinas wrote:

I've relanded the fix to resolve the sanitizer build bot failures with this PR: https://github.com/llvm/llvm-project/pull/161573  It should be good now.

https://github.com/llvm/llvm-project/pull/161606