Refactor tests and remove unused imports

- Cleaned up test files by removing unnecessary imports and unused parameters.
- Simplified test functions by eliminating redundant parameterization and consolidating logic.
- Updated test cases to directly use defined values instead of parameterized inputs where applicable.
- Enhanced readability and maintainability of the test code across various test files.

tests/anyimage/operators/test_cutout_objects.py

@@ -1,9 +1,8 @@
-from types import SimpleNamespace
 from unittest.mock import patch
 import bpy
 import numpy as np
 import pytest
-from mathutils import Matrix, Vector
+from mathutils import Vector
 
 
 from anyimage.common import depth as depth_data