test: remove broken debugger scenarios

`test-debug-break-on-uncaught` was hanging on the domain and parse error
scenarios. These tests are not run in CI and may have been broken
for a very long time.

Refs: https://github.com/nodejs/node/issues/3156
Refs: https://github.com/nodejs/node/commit/c16963b9
PR-URL: https://github.com/nodejs/node/pull/5532


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rod Vagg <r@va.gg>