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I am removing the recently added integration test for various Arith Ops. These operations and their lowerings are effectively already verified by the Arith-to-LLVM conversion tests in: * "mlir/test/Conversion/ArithToLLVM/arith-to-llvm.mlir" I've noticed that a few variants of `arith.cmpi` were missing in that file - those are added here as well. This is a follow-up for this discussion: * https://github.com/llvm/llvm-project/pull/92272 See also the recent update to our guidelines on e2e tests in MLIR: * https://github.com/llvm/mlir-www/pull/203