Remove contributors section (boiler plate text)

@jkridner Attempting to reduce the boilerplate text and prioritizing to show contributors names at a single place on top of docs hierarchy.

requested review from @jkridner

Resolving threads from https://git.beagleboard.org/docs/docs.beagleboard.io/-/merge_requests/60

1. Need to show this at a single place, visible all the time or add it to footer?
2. 3. Repeated for each board, need to highlight without adding all this text.

^Tasks for next PR/update

@jkridner Merging this now, please review when you get a change.

merged

mentioned in commit 5663fd9c

See https://git.beagleboard.org/jkridner/docs.beagleboard.io/-/compare/main...45fbabc8ca3cb10737d6c9fc0520823817cbd38d?from_project_id=81&straight=false boards/beaglebone/ai/index.rst for a counter proposal for how this section should look, with the exception the OSHW logo should be within the License Terms admonishment.

Did you take in my suggestions for each index page?

The latest is:

Can we move the boilerplate stuff into some kind of macro to avoid needing to update it so many places? Maybe that'd be too confusing to maintain?

resolved all threads

Can we move this in the ToC under the contribution page?