Revert "tty: make _read throw ERR_TTY_WRITABLE_NOT_READABLE"

This reverts commit 91eec00c.

Refs: https://github.com/nodejs/node/pull/21654
Refs: https://github.com/nodejs/node/issues/21203

PR-URL: https://github.com/nodejs/node/pull/23053


Reviewed-By: James M Snell <jasnell@gmail.com>