P1747 Don't use `char8_t` and `std::u8string` yet in P1389

[wg21bot]

P1747R0 Don't use char8_t and std::u8string yet in P1389 (Yehezkel Bernat)

[tahonermann]

SG16 2019-07 review in Cologne

Polls:

P1747R0 - Paper as proposed.

SF	F	N	A	SA
8	2	0	0	0

That has consensus.

Dropping the SG16 label.

[jensmaurer]

SG20 in Cologne: "Poll: We support removing char8_t and std::u8string from P1389. (no opposition)
Poll: We would like to see UTF-8 string-handling in education guidelines when there is support for UTF-8 string-handling support in C++. Unanimous consent."

[jcvw]

This was accepted in Cologne and merged.

[jcvw]

This issue can be closed @jensmaurer