Revert "[C++20][Modules] Implement P1857R3 Modules Dependency Discovery" (#173118)
Reverts llvm/llvm-project#107168
This patch broke on bots:
- https://lab.llvm.org/buildbot/#/builders/190/builds/33105
- https://lab.llvm.org/buildbot/#/builders/94/builds/13727
- https://lab.llvm.org/buildbot/#/builders/169/builds/18192
and on mac-aarch64 builds.
see
https://github.com/llvm/llvm-project/pull/107168#issuecomment-3675990781