Deprecate update-neuron.sh LCS

[nghtm]

Lets please consider deprecating the update-neuron.sh LCS given the libraries are out of date, or consider updating to most recent libraries:

I would prefer deprecation to simplify LCS unless we have a strong reason to keep this file.

https://awsdocs-neuron.readthedocs-hosted.com/en/latest/release-notes/runtime/aws-neuronx-runtime-lib/index.html#neuron-runtime-library-2-26-42-0

[nghtm]

@KeitaW do you have any opposition to removing the update-neuron.sh script?

If you think it may provide value in the future, we can leave it. Otherwise i can open a PR and remove the file and update lifecycle script .py