[clang] Revert "[CIR] Add math and builtin intrinsics support (#175233)" (PR #180916)

[Priyanshu Kumar via cfe-commits]

Priyanshu3820 wrote:



> I suspect that it will be a very easy fix, but I'm out of cycles today to take a further look myself, hence proposing to revert.

more such tests added in that PR are failing. I am working on them in #180956 

https://github.com/llvm/llvm-project/pull/180916