removed valgrind (had a problem in ubuntu 20.04)

gcontini

2021-05-20 54d1f4ec3b0e212481b711bac3d1dd5c67afe274

 src/library/hw_identifier/ethernet.hpp

@@ -19,7 +19,7 @@
public:
   Ethernet(bool use_ip);
   virtual ~Ethernet();
   virtual LCC_API_IDENTIFICATION_STRATEGY identification_strategy() const;
   virtual LCC_API_HW_IDENTIFICATION_STRATEGY identification_strategy() const;
   virtual std::vector<HwIdentifier> alternative_ids() const;
};