[Mlir-commits] [mlir] [mlir] Remove unused DenseMapInfo::getTombstoneKey (PR #200633)

[Alexis Engelke]

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

LGTM. But please wait for 1-2 days in case we have to revert the DenseMap change again.

https://github.com/llvm/llvm-project/pull/200633