Revert "react-components: add onResourceLoaded prop to TeX"
Revert "react-components: add onResourceLoaded prop to TeX"

This reverts commit 0de8388 in the react-components submodule, by pulling react-components's latest master.

Looks like some mobile devices support the new font loading API, but crash on some of the particulars of how we access the font objects. Let's roll this back for now, and debug in detail later.

This change fixed a non-mission-critical visual bug, so rolling it back is super safe. We'll leave the corresponding Perseus changes intact, so Perseus will continue to pass an unused `onResouceLoaded` prop to `TeX`, and that's okay.

Discussion and diagnosis: https://khanacademy.slack.com/archives/mobile-1s-and-0s/p1485982023001538
The error itself: https://sentry.io/khanacademyorg/mobile-webview/issues/211287170/

Test Plan:
Run tests to make sure we're not crazy, and cross fingers.

Auditors: charlie, amy

ariabuckles/perseus,ariabuckles/perseus,ariabuckles/perseus,learningequality/perseus,ariabuckles/perseus,learningequality/perseus