[Grappler] Re-enable DependencyOptimizer in FunctionTest.testControlFlowStrictness.

PiperOrigin-RevId: 232351788
diff --git a/tensorflow/python/framework/function_test.py b/tensorflow/python/framework/function_test.py
index 3d5a5fe..f541a4f 100644
--- a/tensorflow/python/framework/function_test.py
+++ b/tensorflow/python/framework/function_test.py
@@ -497,8 +497,6 @@
                                          lambda y: AssertFail(y), [x])
       # pylint: enable=unnecessary-lambda
 
-    rewriter_config = rewriter_config_pb2.RewriterConfig(
-        dependency_optimization=rewriter_config_pb2.RewriterConfig.OFF)
     # Enables inlining.
     config = config_pb2.ConfigProto(
         graph_options=config_pb2.GraphOptions(
@@ -506,8 +504,7 @@
                 opt_level=config_pb2.OptimizerOptions.L0,
                 do_common_subexpression_elimination=True,
                 do_function_inlining=True,
-                do_constant_folding=True),
-            rewrite_options=rewriter_config))
+                do_constant_folding=True)))
 
     with session.Session(config=config) as sess:
       # Since the 'False' branch is not taken, the assertion should not fire.