Reproduction steps:
1. Open the attached project “Cinema4DImporter“
2. Observe Console
Expected result: Unity shouldn't log a warning about unsupported files because the project contains a Scripted Importer for c4d files
Actual result: There is a warning in Console: Assets/aa.c4d: Unity no longer supports importing Cinema 4D files directly, but we're working with Maxon to make the experience better. To import Cinema 4D files, install Maxon's external importer
Reproduced with: 2020.3.47f1, 2021.3.24f1, 2022.2.19f1, 2023.1.0b16, 2023.2.0a15
Reproduced on: macOS 13.0.2 (Intel), Windows 11 (user reported)