remove extra async execution

weed/filesys/dirty_pages_mem_chunk.go

@@ -46,8 +46,7 @@ func (pages *MemoryChunkPages) FlushData() error {
 	if !pages.hasWrites {
 		return nil
 	}
-	pages.saveChunkedFileToStorage()
-	pages.writeWaitGroup.Wait()
+	pages.uploadPipeline.FlushAll()
 	if pages.lastErr != nil {
 		return fmt.Errorf("flush data: %v", pages.lastErr)
 	}
@@ -65,18 +64,9 @@ func (pages *MemoryChunkPages) GetStorageOptions() (collection, replication stri
 	return pages.collection, pages.replication
 }
 
-func (pages *MemoryChunkPages) saveChunkedFileToStorage() {
-
-	pages.uploadPipeline.FlushAll()
-
-}
-
 func (pages *MemoryChunkPages) saveChunkedFileIntevalToStorage(reader io.Reader, offset int64, size int64, cleanupFn func()) {
 
 	mtime := time.Now().UnixNano()
-	pages.writeWaitGroup.Add(1)
-	writer := func() {
-		defer pages.writeWaitGroup.Done()
 	defer cleanupFn()
 
 	chunk, collection, replication, err := pages.fh.f.wfs.saveDataAsChunk(pages.fh.f.fullpath())(reader, pages.fh.f.Name, offset)
@@ -95,14 +85,6 @@ func (pages *MemoryChunkPages) saveChunkedFileIntevalToStorage(reader io.Reader,
 
 }
 
-	if pages.fh.f.wfs.concurrentWriters != nil {
-		pages.fh.f.wfs.concurrentWriters.Execute(writer)
-	} else {
-		go writer()
-	}
-
-}
-
 func (pages MemoryChunkPages) Destroy() {
 	pages.uploadPipeline.Shutdown()
 }