Remove leftover visible layer reducer

[rashidakanchwala]

Description

This was an unused reducer in the visible.js. that was leftover from a previous change.
We currently use layers.visible reducer to store the state of layers and the app work's fine if we remove the above code.

Development notes

Couple of line deletion.

QA notes

No functionality changes

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added new entries to the RELEASE.md file
• Added tests to cover my changes

Legal notice

• I acknowledge and agree that, by checking this box and clicking "Submit Pull Request":

• I submit this contribution under the Apache 2.0 license and represent that I am entitled to do so on behalf of myself, my employer, or relevant third parties, as applicable.

• I certify that (a) this contribution is my original creation and / or (b) to the extent it is not my original creation, I am authorised to submit this contribution on behalf of the original creator(s) or their licensees.

• I certify that the use of this contribution as authorised by the Apache 2.0 license does not violate the intellectual property rights of anyone else.

[studioswong]

Hello Rashida!!! Congrats on your first PR on Kedro-viz - good spot!

[richardwestenra]

🎉

[richardwestenra]

I can't figure out why CI isn't running on this PR. If we can't get CI tests to run I'm happy for us to merge it if all the tests pass locally, but we should ideally try to get it working first.

@limdauto Do you have any ideas?

[studioswong]

I can't figure out why CI isn't running on this PR. If we can't get CI tests to run I'm happy for us to merge it if all the tests pass locally, but we should ideally try to get it working first.

@limdauto Do you have any ideas?

@richardwestenra I just merged main and pushed this branch just to see if this could trigger a build on CI and looks like the build is running now. I notice that the previous push didn't trigger any run on circleCI at all - I'm not entirely sure if this is due to a permissions issue, might be worth a look?