Remove nano_bind helpers reference for License section

Author: ASKabalan

README.md

@@ -346,12 +346,3 @@ Copyright 2023 Matthew Price, Jason McEwen and contributors.
 
 `S2FFT` is free software made available under the MIT License. For
 details see the [`LICENCE.txt`](https://github.com/astro-informatics/s2fft/blob/main/LICENCE.txt) file.
-
-The file [`lib/include/kernel_helpers.h`](https://github.com/astro-informatics/s2fft/blob/main/lib/include/kernel_helpers.h) is adapted from
-[code](https://github.com/dfm/extending-jax/blob/c33869665236877a2ae281f3f5dbff579e8f5b00/lib/kernel_helpers.h) in [a tutorial on extending JAX](https://github.com/dfm/extending-jax) by
-[Dan Foreman-Mackey](https://github.com/dfm) and licensed under a [MIT license](https://github.com/dfm/extending-jax/blob/371dca93c6405368fa8e71690afd3968d75f4bac/LICENSE).
-
-The file [`lib/include/kernel_nanobind_helpers.h`](https://github.com/astro-informatics/s2fft/blob/main/lib/include/kernel_nanobind_helpers.h)
-is adapted from [code](https://github.com/jax-ml/jax/blob/3d389a7fb440c412d95a1f70ffb91d58408247d0/jaxlib/kernel_nanobind_helpers.h)
-by the [JAX](https://github.com/jax-ml/jax) authors
-and licensed under a [Apache-2.0 license](https://github.com/jax-ml/jax/blob/3d389a7fb440c412d95a1f70ffb91d58408247d0/LICENSE).