feat: Remove outdated join validation checks

[ritchie46]

#10784

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.34%. Comparing base (8befcd1) to head (c0833e9).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15701      +/-   ##
==========================================
- Coverage   81.34%   81.34%   -0.01%     
==========================================
  Files        1375     1375              
  Lines      176532   176564      +32     
  Branches     2544     2544              
==========================================
+ Hits       143604   143618      +14     
- Misses      32445    32462      +17     
- Partials      483      484       +1     

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[codspeed-hq]

CodSpeed Performance Report

Merging #15701 will not alter performance

_{Comparing join_validation (c0833e9) with main (2ac0da2)}

Summary

✅ 22 untouched benchmarks