test(converter): remove test for translation functionality since the test has no practical significance

Although this test set the number of threads to 2, it did not test parallel translation paths.

This test was actually directly testing BaseTranslator.

test/test_converter.py

@@ -80,28 +80,6 @@ class TestTranslateConverter(unittest.TestCase):
         self.converter.receive_layout(mock_page)
         mock_receive_layout.assert_called_once_with(mock_page)
 
-    @patch("concurrent.futures.ThreadPoolExecutor")
-    @patch("pdf2zh.cache")
-    def test_translation(self, mock_cache, mock_executor):
-        mock_executor.return_value.__enter__.return_value.map.return_value = [
-            "你好",
-            "{v1}",
-        ]
-        mock_cache.deterministic_hash.return_value = "test_hash"
-        mock_cache.load_paragraph.return_value = None
-        mock_cache.write_paragraph.return_value = None
-
-        sstk = ["Hello", "{v1}"]
-        self.converter.thread = 2
-        results = []
-        with patch.object(self.converter, "translator") as mock_translator:
-            mock_translator.translate.side_effect = lambda x: (
-                "你好" if x == "Hello" else x
-            )
-            for s in sstk:
-                results.append(self.converter.translator.translate(s))
-        self.assertEqual(results, ["你好", "{v1}"])
-
     def test_receive_layout_with_complex_formula(self):
         ltpage = LTPage(1, (0, 0, 500, 500))
         ltchar = Mock()