Adjust copyright notice.

Previously we had been pulling-in NumPy and SciPy docs at runtime, but
after the work in #21461 this is no longer the case.

docs/conf.py

@@ -49,7 +49,7 @@ def _do_not_evaluate_in_jax(
 # -- Project information -----------------------------------------------------
 
 project = 'JAX'
-copyright = '2024, The JAX Authors. NumPy and SciPy documentation are copyright the respective authors.'
+copyright = '2024, The JAX Authors'
 author = 'The JAX authors'
 
 # The short X.Y version