breaks dependency loop

weed/filer2/filerstore.go

@@ -2,7 +2,6 @@ package filer2
 
 import (
 	"context"
-	"errors"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
@@ -28,8 +27,6 @@ type FilerStore interface {
 	RollbackTransaction(ctx context.Context) error
 }
 
-var ErrNotFound = errors.New("filer: no entry is found in filer store")
-
 type FilerStoreWrapper struct {
 	actualStore FilerStore
 }