Remove this test, since it won't reliably pass.

At the point where q.size == 0, we can't know that num_threads
threads have actually finished. On e.g. JRuby, they may have
called pop but not yet exited the Thread's body.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53137 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/thread/test_queue.rb

@@ -307,10 +307,7 @@ class TestQueue < Test::Unit::TestCase
     # wait until queue empty
     (Thread.pass; sleep 0.01) until q.size == 0
 
-    # now there should be some waiting consumers
-    assert_equal num_threads - num_items, threads.count{|thr| thr.status}
-
-    # tell them all to go away
+    # close the queue so remaining threads will wake up
     q.close
 
     # wait for them to go away