Muzzle some internal warnings of future interface changes

[adam-sweet]

Describe the bug
Currently I (Adam) got 1730 warnings from running the stock BatteryElectroChem model and UnscentedKalmanFilter in progpy. These are warnings that were put in place to warn of future breaking interface changes. However, getting so many can hide any other warnings that might be significant / relevant.

Relevant Requirements
none

To Reproduce
Create a small test program that instantiates a BatteryElectroChem and an UnscentedKalmanFilter, and run it.

Expected behavior
That these two components which are maintained by the progpy team not produce warnings related to future progpy API changes.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Ubuntu (Linux)
• Python Version 3.10