taken over host osal from upstream branch

osal/host/Clock.cpp

@@ -106,11 +106,6 @@ ReturnValue_t Clock::getUptime(uint32_t* uptimeMs) {
 	return HasReturnvaluesIF::RETURN_OK;
 }
 
-uint32_t Clock::getUptimeSeconds() {
-	timeval uptime = getUptime();
-	return uptime.tv_sec;
-}
-
 
 ReturnValue_t Clock::getDateAndTime(TimeOfDay_t* time) {
 	// do some magic with chrono (C++20!)