[lldb] [llvm] Revert "[NFC][DebugInfo][DWARF] Create new low-level dwarf library (#… (PR #145959)

[David Blaikie via llvm-commits]

dwblaikie wrote:

FYI: per https://llvm.org/docs/CodeReview.html#code-review-workflow - please don't commit a PR without approval, once it's sent for review. If the intent wasn't to precommit review the PR, it should be created with the `skip-precommit-approval` tag.

https://github.com/llvm/llvm-project/pull/145959