[Mlir-commits] [mlir] [mlir][NFC] Use `hasOneBlock` instead of `llvm::hasSingleElement(region)` (PR #149809)

[Krzysztof Drewniak]

https://github.com/krzysz00 approved this pull request.

No objections here, can't see any reason not to land this

https://github.com/llvm/llvm-project/pull/149809