Clean up prevent_rent_paying_rent_recipients feature

[CriesofCarrots]

Problem

Feature Fab5oP3DmsLYCiQZXdjyqT3ukFFPrsmqhXU4WU1AWVVF: prevent_rent_paying_rent_recipients has been activated on all clusters.

Summary of Changes

Clean up feature gating
Probably easiest to review without whitespace changes, as the bulk of the lines changed are simply indented less.

Closes #30151

[CriesofCarrots]

@jstarry , hope you're willing to review. I picked you because of the interactions with the rework you recently did in this area.

[codecov]

Codecov Report

Merging #34418 (d2148f0) into master (07f3883) will increase coverage by 0.0%.
Report is 3 commits behind head on master.
The diff coverage is 100.0%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #34418   +/-   ##
=======================================
  Coverage    81.8%    81.9%           
=======================================
  Files         819      819           
  Lines      221019   220997   -22     
=======================================
+ Hits       180975   181017   +42     
+ Misses      40044    39980   -64     

[CriesofCarrots]

@brooksprumo , since you were a reviewer on Justin's PR, can you take a look at this?

[brooksprumo]

lgtm - diff was quite minimal when ignoring whitespace, like you suggested!