refactor: Remove not needed std::max

Summary:
This is a partial backport of core#24697
https://github.com/bitcoin/bitcoin/pull/24697/commits/fa9284c3e9acec4b44b2560256f27b3d78c753e2

Depends on D15091

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D15093