message: test/lang/cpp/nsimport seems to be passing on macOS, removing xfail
diff: @@ -12,7 +12,6 @@ class TestCppNsImport(TestBase):
  mydir = TestBase.compute_mydir(__file__)
  @expectedFailureAll(oslist=['freebsd'], bugnumber="llvm.org/pr25925")
  - @expectedFailureAll(bugnumber="rdar://problem/28943086")
  def test_with_run_command(self):
  """Tests imported namespaces in C++."""
  self.build()
  