Always create protobuf_equal

* Because currently Paddle only use protobuf 3.

python/paddle/trainer_config_helpers/tests/CMakeLists.txt

@@ -9,17 +9,10 @@ add_test(NAME test_reset_hook
         ${PYTHON_EXECUTABLE} ${PROJ_ROOT}/python/paddle/trainer_config_helpers/tests/test_reset_hook.py
     WORKING_DIRECTORY ${PROJ_ROOT}/python/paddle)
 
-if (PROTOBUF_3)
-  add_paddle_exe(protobuf_equal
+add_paddle_exe(protobuf_equal
   ProtobufEqualMain.cpp)
-  add_test(NAME test_layerHelpers
+add_test(NAME test_layerHelpers
   COMMAND
   ${PROJ_ROOT}/python/paddle/trainer_config_helpers/tests/configs/run_tests.sh ${PYTHON_EXECUTABLE}
   ${CMAKE_CURRENT_BINARY_DIR}/protobuf_equal
-  )
-else()
-  add_test(NAME test_layerHelpers
-    COMMAND
-    ${PROJ_ROOT}/python/paddle/trainer_config_helpers/tests/configs/run_tests.sh ${PYTHON_EXECUTABLE}
-  )
-endif()
+)