remove leftover defer.setDebugging(), to speed up tests from 200s to 83s

src/allmydata/client.py

@@ -72,8 +72,6 @@ class Client(node.Node, Referenceable, testutil.PollMixin):
         return ws.create_start_html(privdiruri, startfile, nodeurl_file)
 
     def init_start_page(self):
-        from twisted.internet import defer
-        defer.setDebugging(True)
         if not self._start_page_observers:
             self._start_page_observers = observer.OneShotObserverList()
             d = self.get_private_uri()

src/allmydata/test/test_system.py

@@ -646,7 +646,6 @@ class SystemTest(testutil.SignalMixin, unittest.TestCase):
         return d
 
     def _do_publish_private(self, res):
-        defer.setDebugging(True)
         self.smalldata = "sssh, very secret stuff"
         ut = upload.Data(self.smalldata)
         d = self.clients[0].get_private_uri()