remove unused function

weed/filesys/dirty_page.go

@@ -25,9 +25,6 @@ func newDirtyPages(file *File) *ContinuousDirtyPages {
 	}
 }
 
-func (pages *ContinuousDirtyPages) releaseResource() {
-}
-
 var counter = int32(0)
 
 func (pages *ContinuousDirtyPages) AddPage(offset int64, data []byte) (chunks []*filer_pb.FileChunk, err error) {

weed/filesys/filehandle.go

@@ -166,7 +166,6 @@ func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) err
 
 	if fh.f.isOpen <= 0 {
 		fh.doFlush(ctx, req.Header)
-		fh.dirtyPages.releaseResource()
 		fh.f.wfs.ReleaseHandle(fh.f.fullpath(), fuse.HandleID(fh.handle))
 		fh.f.entryViewCache = nil
 		fh.f.reader = nil