clippy: fix used_underscore_binding lint

[xtqqczze]

https://rust-lang.github.io/rust-clippy/master/index.html#used_underscore_binding

[codspeed-hq]

CodSpeed Performance Report

Merging #10058 will not alter performance

_{Comparing xtqqczze:clippy/used_underscore_binding (3378e62) with main (996e5e8)}

Summary

✅ 139 untouched
⏩ 37 skipped¹

Footnotes

1. 37 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)

[sylvestre]

some jobs are failing

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/timeout/timeout (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/basenc/bounded-memory is now passing!
Note: The gnu test tests/dd/no-allocate was skipped on 'main' but is now failing.

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/basenc/bounded-memory is now passing!
Note: The gnu test tests/dd/no-allocate was skipped on 'main' but is now failing.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)

[sylvestre]

is it ready? thanks