[native] Get rid of preloadImage logic
[native] Get rid of preloadImage logic

We don't need the dimensions (we get them already from native API), and we're using `FastImage` anyways so no point using `Image.prefetch`.

Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal