fix standalone version proto

Author: jarviszeng-zjc

arch/api/__init__.py

@@ -29,7 +29,7 @@ def _infer_eggroll_version():
     try:
         import eggroll.roll_pair
     except ImportError:
-        LOGGER.warning("can't import eggroll.roll_pair, assuming eggroll 1.x deployed")
+        #LOGGER.warning("can't import eggroll.roll_pair, assuming eggroll 1.x deployed")
         return 1
     return 2