ScrollView: Couple of unnecessary checks was removed from RCTCustomScrollView
ScrollView: Couple of unnecessary checks was removed from RCTCustomScrollView

Summary:
* Now `setFrame:` is called by autoresizing masks, so it is safe.
* Nobody calls `setBounds:`, so it is also safe.

Reviewed By: javache

Differential Revision: D5414441

fbshipit-source-id: 6fc51c7598c4817301db51f627aa1e9840642fec

facebook/react-native,frantic/react-native,farazs/react-native,jevakallio/react-native,pandiaraj44/react-native,farazs/react-native,myntra/react-native,janicduplessis/react-native,javache/react-native,negativetwelve/react-native,ptmt/react-native-macos,makadaw/react-native,arthuralee/react-native,myntra/react-native,exponent/react-native,jevakallio/react-native,exponent/react-native,negativetwelve/react-native,kesha-antonov/react-native,exponent/react-native,kesha-antonov/react-native,javache/react-native,pandiaraj44/react-native,negativetwelve/react-native,cdlewis/react-native,kesha-antonov/react-native,dikaiosune/react-native,formatlos/react-native,farazs/react-native,janicduplessis/react-native,hoastoolshop/react-native,javache/react-native,makadaw/react-native,farazs/react-native,hoangpham95/react-native,kesha-antonov/react-native,dikaiosune/react-native,hammerandchisel/react-native,makadaw/react-native,exponentjs/react-native,dikaiosune/react-native,formatlos/react-native,hoangpham95/react-native,negativetwelve/react-native,janicduplessis/react-native,hoangpham95/react-native,cdlewis/react-native,farazs/react-native,pandiaraj44/react-native,pandiaraj44/react-native,hammerandchisel/react-native,facebook/react-native,arthuralee/react-native,javache/react-native,makadaw/react-native,exponentjs/react-native,javache/react-native,exponentjs/react-native,ptmt/react-native-macos,formatlos/react-native,rickbeerendonk/react-native,formatlos/react-native,janicduplessis/react-native,farazs/react-native,facebook/react-native,makadaw/react-native,frantic/react-native,farazs/react-native,exponent/react-native,kesha-antonov/react-native,rickbeerendonk/react-native,exponentjs/react-native,dikaiosune/react-native,Bhullnatik/react-native,myntra/react-native,formatlos/react-native,pandiaraj44/react-native,exponent/react-native,hammerandchisel/react-native,ptmt/react-native-macos,hoangpham95/react-native,exponent/react-native,exponentjs/react-native,cdlewis/react-native,hoastoolshop/react-native,frantic/react-native,hoangpham95/react-native,jevakallio/react-native,farazs/react-native,myntra/react-native,cdlewis/react-native,kesha-antonov/react-native,ptmt/react-native-macos,formatlos/react-native,makadaw/react-native,javache/react-native,jevakallio/react-native,facebook/react-native,jevakallio/react-native,arthuralee/react-native,facebook/react-native,negativetwelve/react-native,rickbeerendonk/react-native,rickbeerendonk/react-native,exponent/react-native,makadaw/react-native,cdlewis/react-native,dikaiosune/react-native,dikaiosune/react-native,janicduplessis/react-native,Bhullnatik/react-native,jevakallio/react-native,hoastoolshop/react-native,myntra/react-native,pandiaraj44/react-native,myntra/react-native,hoastoolshop/react-native,ptmt/react-native-macos,makadaw/react-native,rickbeerendonk/react-native,arthuralee/react-native,exponentjs/react-native,hammerandchisel/react-native,Bhullnatik/react-native,kesha-antonov/react-native,hammerandchisel/react-native,rickbeerendonk/react-native,makadaw/react-native,ptmt/react-native-macos,myntra/react-native,pandiaraj44/react-native,facebook/react-native,cdlewis/react-native,negativetwelve/react-native,exponentjs/react-native,hoangpham95/react-native,javache/react-native,negativetwelve/react-native,Bhullnatik/react-native,cdlewis/react-native,hoastoolshop/react-native,exponent/react-native,javache/react-native,hammerandchisel/react-native,cdlewis/react-native,dikaiosune/react-native,ptmt/react-native-macos,kesha-antonov/react-native,hoastoolshop/react-native,myntra/react-native,cdlewis/react-native,Bhullnatik/react-native,facebook/react-native,formatlos/react-native,frantic/react-native,hoastoolshop/react-native,farazs/react-native,rickbeerendonk/react-native,hoangpham95/react-native,hoastoolshop/react-native,myntra/react-native,jevakallio/react-native,jevakallio/react-native,rickbeerendonk/react-native,dikaiosune/react-native,formatlos/react-native,frantic/react-native,pandiaraj44/react-native,negativetwelve/react-native,ptmt/react-native-macos,hammerandchisel/react-native,exponentjs/react-native,arthuralee/react-native,Bhullnatik/react-native,formatlos/react-native,facebook/react-native,Bhullnatik/react-native,hoangpham95/react-native,jevakallio/react-native,hammerandchisel/react-native,javache/react-native,Bhullnatik/react-native,janicduplessis/react-native,kesha-antonov/react-native,janicduplessis/react-native,negativetwelve/react-native,facebook/react-native,janicduplessis/react-native,rickbeerendonk/react-native