update this test

Author: l0lawrence

tools/azure-sdk-tools/linting_tools/lint_test_bench/test_files/test_no_typing_under_type_checking.py

@@ -9,9 +9,6 @@
 if TYPE_CHECKING:
     from typing import Any
 
-if TYPE_CHECKING:
-    import typing_extensions
 
-# test_allowed_imports
-if TYPE_CHECKING:
-    from math import PI
+def foo() -> Any:
+    return 42