[xla:cpu] Drop the dependency no kernelgen

The passes have since migrated away from kernelgen, I think the last one was
ShapeSimplification.

PiperOrigin-RevId: 448505918
diff --git a/tensorflow/compiler/xla/service/cpu/BUILD b/tensorflow/compiler/xla/service/cpu/BUILD
index a585b75..b9fe6d6 100644
--- a/tensorflow/compiler/xla/service/cpu/BUILD
+++ b/tensorflow/compiler/xla/service/cpu/BUILD
@@ -225,7 +225,6 @@
         "@llvm-project//mlir:VectorToSCF",
         "//tensorflow/compiler/mlir/hlo:all_passes",
         "//tensorflow/compiler/mlir/hlo:legalize_trigonometric_to_approximation",
-        "//tensorflow/compiler/mlir/tools/kernel_gen/transforms:passes",
         "//tensorflow/compiler/mlir/xla:hlo_to_mlir_hlo",
         "//tensorflow/compiler/xla/service/spmd:stateful_rng_spmd_partitioner",
         "//tensorflow/compiler/xla/service:all_gather_decomposer",