chore: Remove obsolete actor

[john-bodley]

SUMMARY

Previously, in #20499, I removed the unnecessary and now obsolete "actor" construct. It seems like I missed one instance.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

CI.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1776405) 67.14% compared to head (646bc3f) 69.47%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #27147      +/-   ##
==========================================
+ Coverage   67.14%   69.47%   +2.32%     
==========================================
  Files        1901     1901              
  Lines       74444    74444              
  Branches     8304     8305       +1     
==========================================
+ Hits        49989    51721    +1732     
+ Misses      22403    20670    -1733     
- Partials     2052     2053       +1     

Flag	Coverage Δ
hive	53.79% <100.00%> (?)
mysql	78.00% <100.00%> (-0.01%)	⬇️
postgres	78.10% <100.00%> (-0.01%)	⬇️
presto	53.74% <100.00%> (?)
python	83.07% <100.00%> (+4.83%)	⬆️
sqlite	77.62% <100.00%> (-0.01%)	⬇️
unit	56.42% <100.00%> (?)

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[michael-s-molina]

LGTM