🐛 remove roles for non-existent extension API

[joelanford]

Description

Remove editor and viewer roles that we missed when we removed the Extension API prior to releasing 1.0.0.

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.34%. Comparing base (4ecef20) to head (17e8eaf).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1815   +/-   ##
=======================================
  Coverage   68.34%   68.34%           
=======================================
  Files          62       62           
  Lines        5117     5117           
=======================================
  Hits         3497     3497           
  Misses       1390     1390           
  Partials      230      230           

Flag	Coverage Δ
e2e	51.62% <ø> (ø)
unit	55.91% <ø> (ø)

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