[clang] Revert "[Clang] Transform lambda's constraints when instantiating parameter mapping (#195995)" (PR #199228)

[Alexander Kornienko via cfe-commits]

alexfh wrote:

> I believe if you revert this patch, you can also un-ifdef the test case at:
> 
> https://github.com/llvm/llvm-project/blob/3298a0c7e38f92a7a6d7422dca3994b0c1e38609/clang/test/SemaTemplate/concepts.cpp#L1571
> 
> That might help avoid further regressions when this re-lands.

Thanks for the pointer! I couldn't come up with nearly as short of a test case (though I'm not sure this triggers exactly the same crash as https://gcc.godbolt.org/z/P4GbjaG5z does).

https://github.com/llvm/llvm-project/pull/199228