Fix for eos #2160, forgot debug artifact

libraries/chain/contracts/abi_serializer.cpp

@@ -124,7 +124,6 @@ namespace eosio { namespace chain { namespace contracts {
        *  The ABI vector may contain duplicates which would make it
        *  an invalid ABI
        */
-      for( const auto& tt : typedefs )
       FC_ASSERT( typedefs.size() == abi.types.size() );
       FC_ASSERT( structs.size() == abi.structs.size() );
       FC_ASSERT( actions.size() == abi.actions.size() );