Do we need software/environment_overview.md?

Removed from mkdocs.yml:

   - Overview: software/environment_overview.md

Maybe we should be giving a general overview (i.e. somebody needs to write it).

mentioned in issue #203 (closed)

assigned to @jitschin--tu-dresden.de

changed due date to November 03, 2021

Removed in !347 (merged)

closed