the patch has been removed in the following change.
```
commit 4f90a6140c896283151719f05efc34157118ff18
Author: Stuart Ianna <stuart.ianna@motec.com.au>
Date: Mon Jan 23 09:08:00 2023 +1100
libcxx: Remove exiting patches and update libcxx version to 15.0.7
- Add __config_site for NuttX.
In libcxx 12.0.0. CMake concatenated __config_site with _config,
which enabled NuttX to build without its inclusion. In 15.0.7, this
file is configured by CMake and included explicitly in __config.
- Add additional include directories.
- Mute always_inline warning.
- Make the download of libcxx/libcxxabi configurable
```
bb053f137d