Remove most of IREE from the solvers (pybamm-team#5080)

* Remove most of IREE from the solvers

* Cleanup

* Remove most other jax and IREE code blocks

* Update changelog

* Update src/pybamm/solvers/idaklu_solver.py

Author: kratman

CHANGELOG.md

@@ -13,6 +13,7 @@
 
 ## Breaking changes
 
+- Removed the IREE code from the IDAKLU solver ([#5080](https://github.com/pybamm-team/PyBaMM/pull/5080))
 - Removed support for Python 3.9 ([#5052](https://github.com/pybamm-team/PyBaMM/pull/5052))
 
 # [v25.6.0](https://github.com/pybamm-team/PyBaMM/tree/v25.6.0) - 2025-05-27

src/pybamm/__init__.py

@@ -174,7 +174,7 @@
 from .solvers.jax_bdf_solver import jax_bdf_integrate
 
 from .solvers.idaklu_jax import IDAKLUJax
-from .solvers.idaklu_solver import IDAKLUSolver, has_iree
+from .solvers.idaklu_solver import IDAKLUSolver
 
 # Experiments
 from .experiment.experiment import Experiment