refactor: remove effect badges and clear active effects on player reset

tests/test_music_player.py

@@ -256,6 +256,11 @@ class MusicPlayerQueueTest(unittest.IsolatedAsyncioTestCase):
         player.set_effect(GUILD, "fourth_density", True)
         self.assertEqual(player.state(GUILD).active_effects, {"distortion", "fourth_density"})
 
+        # Stopping/clearing the player disables all active effects
+        player.clear(GUILD)
+        self.assertEqual(player.state(GUILD).active_effects, set())
+        self.assertFalse(player.is_effect_active(GUILD, "distortion"))
+        self.assertFalse(player.is_effect_active(GUILD, "fourth_density"))
 
     async def test_default_plays_are_applied_per_guild(self):
         player, _ = build_player()