remove some unused code

src/inc/tskiplist.h

@@ -186,8 +186,6 @@ bool tSkipListRemove(tSkipList *pSkipList, tSkipListKey *pKey);
  */
 void tSkipListRemoveNode(tSkipList *pSkipList, tSkipListNode *pNode);
 
-int32_t tSkipListDefaultCompare(tSkipList *pSkipList, tSkipListKey *a, tSkipListKey *b);
-
 // for debug purpose only
 void tSkipListPrint(tSkipList *pSkipList, int16_t nlevel);
 

src/util/src/tskiplist.c

@@ -805,41 +805,3 @@ int32_t tSkipListPointQuery(tSkipList *pSkipList, tSkipListKey *pKey, int32_t nu
     return retLen;
   }
 }
-
-int32_t tSkipListDefaultCompare(tSkipList *pSkipList, tSkipListKey *a, tSkipListKey *b) {
-  switch (pSkipList->keyType) {
-    case TSDB_DATA_TYPE_TINYINT:
-    case TSDB_DATA_TYPE_SMALLINT:
-    case TSDB_DATA_TYPE_INT:
-    case TSDB_DATA_TYPE_BIGINT:
-    case TSDB_DATA_TYPE_BOOL: {
-      if (a->i64Key == b->i64Key) {
-        return 0;
-      } else {
-        return a->i64Key > b->i64Key ? 1 : -1;
-      }
-    };
-    case TSDB_DATA_TYPE_FLOAT:
-    case TSDB_DATA_TYPE_DOUBLE: {
-      if (fabs(a->dKey - b->dKey) < FLT_EPSILON) {
-        return 0;
-      } else {
-        return a->dKey > b->dKey ? 1 : -1;
-      }
-    };
-    case TSDB_DATA_TYPE_BINARY: {
-      if (a->nLen == b->nLen) {
-        int32_t ret = strncmp(a->pz, b->pz, a->nLen);
-        if (ret == 0) {
-          return 0;
-        } else {
-          return ret > 0 ? 1 : -1;
-        }
-      } else {
-        return a->nLen > b->nLen ? 1 : -1;
-      }
-    };
-  }
-
-  return 0;
-}