Remove unused cylindrical battery geometry support

[vidipsingh]

Description

This PR removes the handling for cylindrical battery geometry from the battery_geometry function, as it is not used anywhere within the repository and was initially meant for future thermal model extensions.

Fixes: #4856

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #)

Important checks:

Please confirm the following before marking the PR as ready for review:

• No style issues: nox -s pre-commit
• All tests pass: nox -s tests
• The documentation builds: nox -s doctests
• Code is commented for hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[prady0t]

If you plan to remove this, you will also need to modify the associated tests. Before opening a PR, run the tests via nox -s unit to get the error log (if any) locally and try to remove them.

[vidipsingh]

If you plan to remove this, you will also need to modify the associated tests. Before opening a PR, run the tests via nox -s unit to get the error log (if any) locally and try to remove them.

Thanks for the heads-up! I'll modify the associated tests and run nox -s unit to check for any errors.
I'll update the PR accordingly after resolving them.