test: remove obsolete domain test

test-microtask-queue-run-immediate-domain.js tests that the behavior of
another test, test-microtask-queue-run-immediate.js, is still
consistent when the core domain module is loaded.

This was needed because before the changes in
https://github.com/nodejs/node/pull/1622 were merged, the core domain
module would replace the function that would call nextTick callbacks
with a different implementation.

This is no longer the case, and as such that test is no longer needed.

R-URL: https://github.com/nodejs/node/pull/23252
Refs: https://github.com/nodejs/node/pull/16222


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>