Clean up namespace.

PiperOrigin-RevId: 339502796
Change-Id: Icfbf94ae18aa074e0bed4bccd44237906d441a3c

tensorflow/compiler/mlir/tfr/integration/tfr_decompose_ctx_test.cc

@@ -39,6 +39,7 @@ using testing::Test;
 using NodeAndType = std::pair<std::string, tensorflow::DataType>;
 
 namespace tensorflow {
+namespace {
 
 REGISTER_OP("MyAddN")
     .Input("inputs: N * T")
@@ -58,8 +59,6 @@ REGISTER_OP("RiscAdd")
         "complex64, complex128, string}")
     .SetShapeFn(shape_inference::UnchangedShape);
 
-namespace {
-
 constexpr char tfr_raw_text[] = R"(
 
 tfr.func @tf__my_add_n(%values: !tfr.tensor_list,