[llvm] Revert "[Utils][SPIR-V] Adding spirv-sim to LLVM" (PR #107084)

[Nathan Gauër via llvm-commits]

Keenuts wrote:

Buildbots uses python3.8.
The type annotations like `list[int]` are only supported starting python3.9 (https://peps.python.org/pep-0585/) Fixing the PR

https://github.com/llvm/llvm-project/pull/107084