Revert order of Remove Mount Item operations
Revert order of Remove Mount Item operations

Summary: Revert the order of "remove mount items", to ensure views are removed from high index to low index.

Reviewed By: shergin

Differential Revision: D8742796

fbshipit-source-id: 6e04c39386d290bf3958ee83256d4fbe23e2c4ca

pandiaraj44/react-native,exponent/react-native,exponent/react-native,janicduplessis/react-native,myntra/react-native,javache/react-native,javache/react-native,exponentjs/react-native,janicduplessis/react-native,javache/react-native,hammerandchisel/react-native,janicduplessis/react-native,hoangpham95/react-native,exponentjs/react-native,exponentjs/react-native,arthuralee/react-native,hammerandchisel/react-native,facebook/react-native,exponentjs/react-native,arthuralee/react-native,hammerandchisel/react-native,pandiaraj44/react-native,facebook/react-native,javache/react-native,exponentjs/react-native,pandiaraj44/react-native,exponentjs/react-native,hoangpham95/react-native,hammerandchisel/react-native,javache/react-native,hoangpham95/react-native,exponent/react-native,facebook/react-native,exponent/react-native,pandiaraj44/react-native,facebook/react-native,javache/react-native,myntra/react-native,facebook/react-native,janicduplessis/react-native,exponent/react-native,exponent/react-native,javache/react-native,facebook/react-native,hoangpham95/react-native,arthuralee/react-native,myntra/react-native,hammerandchisel/react-native,janicduplessis/react-native,arthuralee/react-native,arthuralee/react-native,myntra/react-native,myntra/react-native,hammerandchisel/react-native,janicduplessis/react-native,janicduplessis/react-native,pandiaraj44/react-native,hoangpham95/react-native,exponent/react-native,facebook/react-native,myntra/react-native,pandiaraj44/react-native,janicduplessis/react-native,myntra/react-native,exponentjs/react-native,javache/react-native,hoangpham95/react-native,facebook/react-native,hoangpham95/react-native,facebook/react-native,hoangpham95/react-native,myntra/react-native,exponent/react-native,hammerandchisel/react-native,myntra/react-native,javache/react-native,pandiaraj44/react-native,exponentjs/react-native,pandiaraj44/react-native,hammerandchisel/react-native