RN: Cleanup `Text` Implementation
RN: Cleanup `Text` Implementation

Reviewed By: sahrens, TheSavior

Differential Revision: D7901531

fbshipit-source-id: dfaba402c1c26e34e9d2df01f2bbb8c26dfcd17e

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