chore(ui-editor): remove custom component from toolbar list

[nkylstad]

Description

See #14361 for reasoning.
This PR only removes the component from the component toolbar, and does not remove the json schemas or any of the config setups. Layouts with this component in use will still be able to configure it.

Related Issue(s)

• Hide Custom component type from component list #14361

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

[nkylstad]

Testing comment - this can probably be tested locally rather than deployed to dev, as it is a tiny frontend change 😊

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.54%. Comparing base (a712b7d) to head (149ffb5).
Report is 15 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14362   +/-   ##
=======================================
  Coverage   95.54%   95.54%           
=======================================
  Files        1860     1860           
  Lines       24106    24106           
  Branches     2783     2783           
=======================================
  Hits        23031    23031           
  Misses        817      817           
  Partials      258      258           

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[lassopicasso]

👍

[mlqn]

Tested OK locally! 🚀