refactor: use the built-in max to simplify the code

[russcoss]

Problem

In Go 1.21, the standard library includes built-in max/min function, which can greatly simplify the code.

Solution

...

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.04%. Comparing base (ff57de1) to head (64f9bdb).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4020      +/-   ##
==========================================
- Coverage   82.12%   82.04%   -0.08%     
==========================================
  Files         351      351              
  Lines       50119    50119              
==========================================
- Hits        41159    41120      -39     
- Misses       7225     7265      +40     
+ Partials     1735     1734       -1     

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