[clang] [llvm] Revert "[HLSL] Add `Increment`/`DecrementCounter` methods to structured buffers (#114148)" (PR #117448)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

In the future, when you revert a commit, please put a note in the commit message explaining why you're reverting, so other people can understand what you're doing.

https://github.com/llvm/llvm-project/pull/117448