Enable CSE in optimizer (#2361)

Author: titaiwangms

onnxscript/ir/passes/common/__init__.py

@@ -21,6 +21,7 @@
     AddInitializersToInputsPass,
     CheckerPass,
     ClearMetadataAndDocStringPass,
+    CommonSubexpressionEliminationPass,
     InlinePass,
     LiftConstantsToInitializersPass,
     LiftSubgraphInitializersToMainGraphPass,
@@ -31,7 +32,3 @@
     ShapeInferencePass,
     TopologicalSortPass,
 )
-
-from onnxscript.ir.passes.common.common_subexpression_elimination import (
-    CommonSubexpressionEliminationPass,
-)