remove check the current_period is in progress

`current_period` may not actually be always currently in progress.
To add to injury, when the demo instance doesn't update it's database,
the test fails.

pronotepy/test_pronotepy.py

@@ -40,13 +40,6 @@ def test_periods(self) -> None:
     def test_current_period(self) -> None:
         p = client.current_period
         self.assertIsNotNone(p)
-        pronote_time = pronotepy.Util.datetime_parse(
-            client.func_options["donneesSec"]["donnees"]["DateServeurHttp"]["V"]
-        )
-        self.assertTrue(
-            p.start < pronote_time < p.end,
-            "current_period is not in progress",
-        )
 
     def test_homework(self) -> None:
         start = client.start_day