Remove unused importlib import from test_lazy_imports.py

- importlib was imported but never used in the test file
- All tests still pass after removal

Co-authored-by: 4n4nd <22333506+4n4nd@users.noreply.github.com>

Author: Copilot

tests/test_lazy_imports.py

@@ -2,7 +2,6 @@
 import unittest
 import sys
 import subprocess
-import importlib
 
 
 class TestLazyImports(unittest.TestCase):