diff --git a/xla/mlir_hlo/BUILD b/xla/mlir_hlo/BUILD
index e8147577018ee..8b8f59da1a7cb 100644
--- a/xla/mlir_hlo/BUILD
+++ b/xla/mlir_hlo/BUILD
@@ -1147,7 +1147,6 @@ cc_library(
     srcs = [
         "stablehlo_ext/transforms/chlo_recompose_ops.cpp",
         "stablehlo_ext/transforms/stablehlo_canonicalize_dynamism.cpp",
-        "stablehlo_ext/transforms/stablehlo_compatibility_expander.cpp",
         "stablehlo_ext/transforms/stablehlo_refine_shapes.cpp",
     ],
     hdrs = [
diff --git a/xla/mlir_hlo/stablehlo_ext/transforms/passes.h b/xla/mlir_hlo/stablehlo_ext/transforms/passes.h
index 22c6d637c1409..e2b77594141f0 100644
--- a/xla/mlir_hlo/stablehlo_ext/transforms/passes.h
+++ b/xla/mlir_hlo/stablehlo_ext/transforms/passes.h
@@ -32,12 +32,6 @@ namespace stablehlo_ext {
 
 void createChloLegalizeToStablehloPipeline(OpPassManager &pm);
 
-// Expand backward compatibility with the given StableHLO version by decomposing
-// newer StableHLO operations into equivalent operations supported by that older
-// version.
-std::unique_ptr<Pass> createStablehloCompatibilityExpanderPass(
-    std::string targetVersionOption);
-
 }  // namespace stablehlo_ext
 }  // namespace mlir