<fix>:remove clamp timestamp since 36500days makes it unnecessary

src/tsdb/src/tsdbMemTable.c

@@ -648,9 +648,6 @@ static int tsdbScanAndConvertSubmitMsg(STsdbRepo *pRepo, SSubmitMsg *pMsg) {
   TSKEY          minKey = now - tsTickPerDay[pRepo->config.precision] * pRepo->config.keep;
   TSKEY          maxKey = now + tsTickPerDay[pRepo->config.precision] * pRepo->config.daysPerFile;
   
-  if (minKey >= now) minKey = MIN_TS_KEY;
-  if (maxKey <= now) maxKey = MAX_TS_KEY; 
-
   terrno = TSDB_CODE_SUCCESS;
   pMsg->length = htonl(pMsg->length);
   pMsg->numOfBlocks = htonl(pMsg->numOfBlocks);