The patch for Bug 1697453 made it so we weren't dispatching resources tied to
a target being destroyed. This revealed an issue when adding a test for webextension
popup messages, where the target is being destroyed before the browser console can
consume it (see following patches in this queue).
Since Bug 1697453 was only done to try to make `browser_toolbox_backward_forward_navigation.js`
pass when fission is enabled, and given it's still failing, let's revert this
patch for now and reassess if this is needed, and if so, if we shoul only do that
for some specific resources.

Differential Revision: https://phabricator.services.mozilla.com/D108631