Remove FlowFixMe on ref
Remove FlowFixMe on ref

Summary:
Changelog:
[Internal][Fixed]:Remove FlowFixMe VirtualizedSectionList ref

Reviewed By: nadiia

Differential Revision: D26381836

fbshipit-source-id: ed9a687c50a05f1176d99e6e6bd362ac830fbfae

facebook/react-native,arthuralee/react-native,javache/react-native,myntra/react-native,janicduplessis/react-native,facebook/react-native,pandiaraj44/react-native,janicduplessis/react-native,myntra/react-native,javache/react-native,myntra/react-native,janicduplessis/react-native,pandiaraj44/react-native,pandiaraj44/react-native,arthuralee/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,arthuralee/react-native,myntra/react-native,myntra/react-native,pandiaraj44/react-native,facebook/react-native,arthuralee/react-native,pandiaraj44/react-native,facebook/react-native,myntra/react-native,pandiaraj44/react-native,facebook/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,javache/react-native,facebook/react-native,facebook/react-native,janicduplessis/react-native,pandiaraj44/react-native,janicduplessis/react-native,myntra/react-native,facebook/react-native,javache/react-native,myntra/react-native,arthuralee/react-native,janicduplessis/react-native,myntra/react-native,javache/react-native,pandiaraj44/react-native