📚[DOC]: Remove older getting started and release notes pages from Sym Docs

[ktangsali]

How would you describe the priority of this documentation request

Medium

Is this for new documentation, or an update to existing docs?

Update

Describe the incorrect/future/missing documentation

The existing pages must be deleted in favor of

https://docs.nvidia.com/deeplearning/modulus/getting-started/

https://docs.nvidia.com/deeplearning/modulus/release-notes/

If this is a correction, please provide a link to the incorrect documentation. If this is a new documentation request, please link to where you have looked.

No response