Merge pull request #1353 from sangshuduo/remove-unused-refCount-comparison-with-0

remove unused comparison with 0 as refCount >=0 always.

src/util/src/tcache.c

@@ -249,11 +249,6 @@ static void taosClearCacheTrash(SCacheObj *pObj, bool force) {
   SDataNode *pNode = pObj->pTrash;
 
   while (pNode) {
-    if (pNode->refCount < 0) {
-      pError("key:%s %p in trash released more than referenced, removed", pNode->key, pNode);
-      pNode->refCount = 0;
-    }
-
     if (pNode->next == pNode) {
       pNode->next = NULL;
     }