UI: Clean up unused error and Edit code

[jacobshandling]

Side quest while doing feature work - Edit modal and error code was completely unused

• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.88%. Comparing base (7dd2f85) to head (13ba6af).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #26514      +/-   ##
==========================================
+ Coverage   63.85%   63.88%   +0.02%     
==========================================
  Files        1661     1660       -1     
  Lines      159221   159154      -67     
  Branches     4145     4118      -27     
==========================================
- Hits       101671   101669       -2     
+ Misses      49613    49548      -65     
  Partials     7937     7937              

Flag	Coverage Δ
frontend	53.96% <ø> (+0.27%)	⬆️

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[sgress454]

Verified that I could still add an integration, and delete it, and that the edit code is indeed unused.