Tests: Reduce threshold on denoising now all platforms use OIDN 2.2

Pull Request: https://projects.blender.org/blender/blender/pulls/117994

tests/python/cycles_render_tests.py

@@ -147,8 +147,6 @@ def main():
     test_dir_name = Path(test_dir).name
     if test_dir_name in ('motion_blur', 'integrator', ):
         report.set_fail_threshold(0.032)
-    if test_dir_name == "denoise":
-        report.set_fail_threshold(0.25)
 
     ok = report.run(test_dir, blender, get_arguments, batch=args.batch)