Remove animated prop
Remove animated prop

Summary:
This prop was deprecated in April 2016 in [this commit](https://github.com/facebook/react-native/commit/2bb1c263dbdce8f92ed5af41a729470238157799#diff-931cea019b5e9faceffef4e46f1fff08), first in 0.26.0

It's been a while, we can remove it now.

Changelog:
[Breaking][General] Modal: Remove support for `aniamted` prop (deprecated in 0.26)

Reviewed By: cpojer

Differential Revision: D19762163

fbshipit-source-id: b6173bba066fc9ad0e786f56a946e2f3fa3d79cc

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