Remove 'Edit on CCBR/ASPEN' edit link from docs site

[kopardev]

Description

The docs site (built with MkDocs Material) currently shows an "Edit on CCBR/ASPEN" link/pencil icon on every page, generated from the edit_uri setting in mkdocs.yml:

repo_name: CCBR/ASPEN
repo_url: https://github.com/CCBR/ASPEN
edit_uri: https://github.com/CCBR/ASPEN/edit/main/docs/

This link lets any visitor jump straight to GitHub's in-browser editor for the corresponding doc file on main. We should remove (or reconsider) this behavior.

Proposed change

• Remove the edit_uri line from mkdocs.yml (or point it at a PR-based workflow instead of direct edits on main).
• Rebuild/verify the docs site no longer shows the "Edit on CCBR/ASPEN" link.

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