Update test_lib_Cog.py

tests/test_lib_Cog.py

@@ -5,12 +5,11 @@ from mock import mock
 from ..lib.CogsPrep import cog_list, work_with_cogs
 
 
-@pytest.mark.asyncio
 @mock.patch('discord_bot.lib.CogsPrep.cog_list')
 async def test_cog_list(mock_cog_list):
     with mock.patch('discord_bot.lib.CogsPrep.listdir') as MockClass:
         MockClass.return_value = ['cog1.py', 'cog2.py']
-        result = await cog_list()
+        result = cog_list()
         assert result == ['cog1', 'cog2']