Remove denoise module and thirdparty OIDN.

This is replaced by a much lighter weight and faster JNLM denoiser. OIDN is still much more accurate, and may be provided as an optional backend in the future, but the JNLM denoiser seems good enough for most use cases and removing OIDN reduces the build system complexity, binary size, and build times very significantly.

Author: DarioSamo

COPYRIGHT.txt

@@ -425,11 +425,6 @@ Comment: Stripped down version of "nvapi.h" from the NVIDIA NVAPI SDK
 Copyright: 2019-2022, NVIDIA Corporation
 License: Expat
 
-Files: ./thirdparty/oidn/
-Comment: Intel Open Image Denoise
-Copyright: 2009-2019, Intel Corporation
-License: Apache-2.0
-
 Files: ./thirdparty/openxr/
 Comment: OpenXR Loader
 Copyright: 2020-2023, The Khronos Group Inc.