Remove unused pytest import and add trailing newline

- Removed unused pytest import (caplog fixture was removed)
- Added missing trailing newline at end of file

Addresses Greptile feedback (minor style issues).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

tests/test_litellm/test_cost_calculation_log_level.py

@@ -3,8 +3,6 @@ import logging
 import os
 import sys
 
-import pytest
-
 sys.path.insert(0, os.path.abspath("../../.."))
 
 import litellm
@@ -139,4 +137,4 @@ def test_batch_cost_calculation_uses_debug_level():
     finally:
         # Clean up: remove handler and restore original logger level
         verbose_logger.removeHandler(handler)
-        verbose_logger.setLevel(original_level)
+        verbose_logger.setLevel(original_level)