test: remove test/pummel/test-http-client-reconnect-bug.js

test-http-client-reconnect-bug depends on `http.createClient()` which
was removed in Node.js 7.0.0. The test was added way back in commit
30b0522 for a bug fixed in Node.js
0.1.27 in early 2010. We've apparently been fine with it failing since
at least Node.js 7.0.0 which at this time is more than 2 years ago.

Remove this test.

PR-URL: #25387
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>