Fix up

app/src/main/java/com/hippo/conaco/ConacoTask.java

@@ -441,7 +441,6 @@ public final class ConacoTask<V> {
                     receivedSize += bytesRead;
                     notifyProgress(bytesRead, receivedSize, length);
                 }
-                os.flush();
 
                 return true;
             } catch (IOException e) {