算法4优化，初始参考值使用最近一个有效解

sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/calc/SingleLineGNSSCalcService.java

@@ -158,7 +158,6 @@ public class SingleLineGNSSCalcService implements GNSSDataCalcService {
 
     private void calCycleResult(Device device, GnssGroupCalc groupCalc, LocalDateTime resultTime) {
         String deviceId = device.getDeviceId();
-        Integer tenantId = device.getTenantId();
         FocusCalculator focusCalculator = calculatorMap.get(deviceId);
         if(focusCalculator == null) return;