Remove font choices from REL1_23 branch while the implementation is unstable

Especially as they are undocumented, against release policy (bug 63351).
Follows up to Ic5ba836364d04b2c3814777b69b5f47fce25292a etc.

Bug: 63942
Change-Id: I595feec9a525104e382f7730208b1cf32c496e8d