Remove jaxlib.hlo_helpers.

This module has been deprecated for many months and its replacement is jax.ffi.

PiperOrigin-RevId: 808567797
Change-Id: I5b4f4eee5e65ccd86e597c5761e68c36292b6209

Author: hawkinsp

mjx/mujoco/mjx/third_party/warp/jax_experimental/custom_call.py

@@ -119,7 +119,7 @@ def _create_jax_warp_primitive():
     from jax._src.interpreters import batching
     from jax.interpreters import mlir
     from jax.interpreters.mlir import ir
-    from jax.jaxlib.hlo_helpers import custom_call
+    from jax.google.hlo_helpers import custom_call
 
     global _jax_warp_p
     global _cc_callback