Fixed a couple bugs with pathwaysutils.jax

PiperOrigin-RevId: 813918268

Author: lukebaumann

pathwaysutils/jax/__init__.py

@@ -77,14 +77,14 @@ def register_backend_cache(cache: Any, name: str, util=util):  # pylint: disable
 
 try:
   # jax>=0.8.0
-  from jax.jaxlib import _pathways  # pylint: disable=g-import-not-at-top
+  from jaxlib import _pathways as jaxlib_pathways  # pylint: disable=g-import-not-at-top
 
-  jaxlib_pathways = _pathways
-  del _pathways
-except ModuleNotFoundError:
+except ImportError:
   # jax<0.8.0
 
   jaxlib_pathways = _FakeJaxModule("jax.jaxlib._pathways", "0.8.0")
 
 
+del jax
+del Any
 del _FakeJaxModule