diff --git a/kernel/sql/cache.go b/kernel/sql/cache.go
index 1ff183824..1901f5759 100644
--- a/kernel/sql/cache.go
+++ b/kernel/sql/cache.go
@@ -17,7 +17,6 @@
 package sql
 
 import (
-	"runtime/debug"
 	"time"
 
 	"github.com/88250/lute/ast"
@@ -46,7 +45,6 @@ var blockCache, _ = ristretto.NewCache(&ristretto.Config{
 
 func ClearCache() {
 	blockCache.Clear()
-	debug.FreeOSMemory()
 }
 
 func putBlockCache(block *Block) {
diff --git a/kernel/sql/database.go b/kernel/sql/database.go
index e019a8b74..1933582bd 100644
--- a/kernel/sql/database.go
+++ b/kernel/sql/database.go
@@ -820,10 +820,6 @@ func heading(node *ast.Node) *ast.Node {
 	return nil
 }
 
-func DeleteBlockByIDs(tx *sql.Tx, ids []string) (err error) {
-	return deleteBlocksByIDs(tx, ids)
-}
-
 func deleteByBoxTx(tx *sql.Tx, box string) (err error) {
 	if err = deleteBlocksByBoxTx(tx, box); nil != err {
 		return