chore: Fix clang-tidy issues from merging unused-local-non-trivial-variable

[godexsoft]

High Level Overview of Change

This PR fixes some more issues that were not detected in the original PR (strange) but popped up in develop: https://github.com/XRPLF/rippled/actions/runs/22860818639/job/66313977737

Context of Change

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Performance (increase or change in throughput and/or latency)
• Tests (you added tests for code that already exists, or your new feature included in this PR)
• Documentation update
• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
• Release

API Impact

No impact.

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.9%. Comparing base (e2290b1) to head (d5ffc9b).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #6509   +/-   ##
=======================================
  Coverage     79.8%   79.9%           
=======================================
  Files          862     862           
  Lines        67876   67873    -3     
  Branches      7556    7543   -13     
=======================================
+ Hits         54185   54204   +19     
+ Misses       13691   13669   -22     

Files with missing lines	Coverage Δ
src/libxrpl/ledger/View.cpp	94.5% <ø> (-<0.1%)	⬇️
src/xrpld/app/ledger/detail/InboundLedger.cpp	36.1% <ø> (+0.1%)	⬆️
src/xrpld/core/detail/Config.cpp	77.8% <ø> (-<0.1%)	⬇️

... and 7 files with indirect coverage changes

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