some cleanup

libi2pd/RouterContext.cpp

@@ -721,12 +721,7 @@ namespace i2p
 
 	uint32_t RouterContext::GetUptime () const
 	{
-#ifdef WIN32
-		// for compatibility with WinXP
-		return i2p::util::GetSecondsSinceEpoch () - m_StartupTime;
-#else
 		return std::chrono::duration_cast<std::chrono::seconds> (std::chrono::steady_clock::now() - m_StartupTime).count ();
-#endif
 	}
 
 	bool RouterContext::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx) const

libi2pd/RouterContext.h

@@ -136,12 +136,8 @@ namespace i2p
 			i2p::data::PrivateKeys m_Keys;
 			std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor;
 			uint64_t m_LastUpdateTime; // in seconds
-			bool m_AcceptsTunnels, m_IsFloodfill;
-#ifdef WIN32
-			uint64_t m_StartupTime = 0; // in seconds since epoch
-#else			
+			bool m_AcceptsTunnels, m_IsFloodfill;	
 			std::chrono::time_point<std::chrono::steady_clock> m_StartupTime;
-#endif
 			uint64_t m_BandwidthLimit; // allowed bandwidth
 			int m_ShareRatio;
 			RouterStatus m_Status;