Gut console reporting of ephemeral rejections

Fixes #474

The console on WebKit takes a snapshot when a live object is expanded, rendering the once simply annoying unhandled rejection log almost completely useless. This is my proposal for the interim fix on the `v1`, which retains the public interface for querying unhandled rejection reasons, but removes the logging features for both browsers and Node.js. The Node.js interface didn’t work anyway.