fix linter warning

Author: japdubengsub

tests/tests_pytorch/loggers/test_comet.py

@@ -15,13 +15,9 @@
 from unittest import mock
 from unittest.mock import Mock, call
 
-import pytest
 from torch import tensor
 
-from lightning.pytorch import Trainer
-from lightning.pytorch.demos.boring_classes import BoringModel
 from lightning.pytorch.loggers import CometLogger
-from lightning.pytorch.utilities.exceptions import MisconfigurationException
 
 FRAMEWORK_NAME = "pytorch-lightning"