Removing deprecated option from proto file

- refer go/namespacing-nano for additional details.

Change-Id: Ib34fd9dd8efcbab3859201a0c72c2804c675a162
diff --git a/proto/polo.proto b/proto/polo.proto
index 0491439..3d8ef75 100644
--- a/proto/polo.proto
+++ b/proto/polo.proto
@@ -2,7 +2,9 @@
 
 package polo.wire.protobuf;
 
-option javanano_use_deprecated_package = true;
+//removing deprecated option.
+//refer go/namespacing-nano for additional details.
+//option javanano_use_deprecated_package = true;
 option java_outer_classname = "PoloProto";
 option java_package = "com.google.polo.wire.protobuf";
 option optimize_for = LITE_RUNTIME;