Remove scrollEventThrottle defaultProps
Remove scrollEventThrottle defaultProps

Summary:
Changelog:
[Internal][Changed] -Remove scrollEventThrottle from defaultProps as part of larger effort to remove defaultProps from VirtualizedList

Reviewed By: nadiia

Differential Revision: D26969580

fbshipit-source-id: 504e11493113c01d70e77b90f96c6506c179c060

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