remove; we generate a machine keypair on demand

doing things "on first run" is fragile: it might be interrupted, in which
case we either do it again next time (running first-run tasks more than
once) or we don't do any (skipping some of them).  instead, do things
on demand, and keep track of which tasks have completed

stepmania/src/StepMania.cpp

@@ -844,11 +844,6 @@ void SaveGamePrefsToDisk()
 	ini.WriteFile( GAMEPREFS_INI_PATH );
 }
 
-static void OnFirstRun()
-{
-	// TODO: generate a machine keypair here
-}
-
 static void MountTreeOfZips( const CString &dir )
 {
 	vector<CString> dirs;
@@ -1081,9 +1076,6 @@ int main(int argc, char* argv[])
 	LOG->Info( "TLS is %savailable", RageThread::GetSupportsTLS()? "":"not " );
 #endif
 
-	if( PREFSMAN->m_bFirstRun )
-		OnFirstRun();
-
 	CheckSettings();
 
 	GAMEMAN		= new GameManager;