Finalize deprecations of jax.interpreters.ad config & source_info_util

These have been raising a DeprecationWarning since JAX 0.4.19, released 2023 Oct 19. I've left the undefined symbols in place for now, as they will raise an informative AttributeError.

PiperOrigin-RevId: 616931120

Author: Jake VanderPlas

CHANGELOG.md

@@ -18,6 +18,9 @@ Remember to align the itemized text with the first line of an item within a list
     that cannot be converted to a JAX array now results in an exception.
   * The deprecated flag `jax_parallel_functions_output_gda` has been removed.
     This flag was long deprecated and did nothing; its use was a no-op.
+  * The previously-deprecated imports `jax.interpreters.ad.config` and
+    `jax.interpreters.ad.source_info_util` have now been removed. Use `jax.config`
+    and `jax.extend.source_info_util` instead.
 
 ## jaxlib 0.4.26
 

jax/interpreters/ad.py

@@ -73,32 +73,18 @@
   zeros_like_p as zeros_like_p,
 )
 
-from jax import config as _deprecated_config
-from jax._src import source_info_util as _deprecated_source_info_util
 _deprecations = {
-    # Added Oct 13, 2023:
+    # Finalized Mar 18, 2024; remove after June 18, 2024
     "config": (
         "jax.interpreters.ad.config is deprecated. Use jax.config directly.",
-        _deprecated_config,
+        None,
     ),
     "source_info_util": (
         "jax.interpreters.ad.source_info_util is deprecated. Use jax.extend.source_info_util.",
-        _deprecated_source_info_util,
+        None,
     ),
 }
 
-import typing
-if typing.TYPE_CHECKING:
-  config = _deprecated_config
-  source_info_util = _deprecated_source_info_util
-else:
-  from jax._src.deprecations import deprecation_getattr as _deprecation_getattr
-  __getattr__ = _deprecation_getattr(__name__, _deprecations)
-  del _deprecation_getattr
-del typing
-del _deprecated_config
-del _deprecated_source_info_util
-
 def backward_pass(jaxpr, reduce_axes, transform_stack,
                   consts, primals_in, cotangents_in):
   if reduce_axes: