Remove the Emeritus contributors from velero team section

[reasonerjt]

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.94%. Comparing base (c30d044) to head (6933e66).
Report is 16 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8414   +/-   ##
=======================================
  Coverage   58.94%   58.94%           
=======================================
  Files         367      367           
  Lines       38926    38926           
=======================================
  Hits        22945    22945           
  Misses      14518    14518           
  Partials     1463     1463           

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[kaovilai]

Previews LGTM!