Thread::Queue: clean up some tests

[mauke]

Some of the tests (04_errs.t, 08_nothreads.t, 09_ended.t) already use Test::More unconditionally, so remove the conditional loading code from the other tests. Also, use Config doesn't need to be in a BEGIN block.

---

• This set of changes does not require a perldelta entry.

[tonycoz]

I don't see why not. t/test.pl only exists in the perl core. Anything installed from CPAN won't have access to it anyway.

Threads::Queue (and IO, threads.pm) bundle an old copy of test.pl in their CPAN distributions.

Porting/test-dist-modules.pl populates that with an old version (because blead's isn't compatible) when testing those modules.

[tonycoz]

Though looking at the test runs, dist-modules isn't using threaded perls when it should (looking into it)