feat(theme-wrapper): remove shrink-to-fit=no

[knowler]

Sounds like this was only needed from about iOS 9.0-9.3.2 (see articles for a more accurate range).

See:

• https://www.matuzo.at/blog/html-boilerplate/
• https://www.scottohara.me/blog/2018/12/11/shrink-to-fit.html
• HTML 5 Boilerplate