Update or remove remove the Metal on iOS Wiki page. #115243
Description
The wiki page is outdated in various ways:
- Mentions OpenGL ES which we have migrated away from.
- Notes minimum OS versions which are outdated.
- Has guidance on binary size that is now invalid since there is no OpenGL ES at all.
Since Metal is everywhere on iOS and the transition has been completed, I think we should just remove the wiki entry as it is causing confusion.