Remove deprecated internal spanBuilder methods

[amarziali]

What Does This Do

Motivation

Additional Notes

Contributor Checklist

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Jira ticket: [PROJ-IDENT]

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[pr-commenter]

Debugger benchmarks

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
ci_job_date	1778059610	1778059956
end_time	2026-05-06T09:28:15	2026-05-06T09:34:01
git_branch	master	andrea.marziali/deprecate
git_commit_sha	6ab3100	c595015
start_time	2026-05-06T09:26:51	2026-05-06T09:32:37

See matching parameters

	Baseline	Candidate
ci_job_id	1660141455	1660141455
ci_pipeline_id	111683324	111683324
cpu_model	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
git_commit_date	1778058962	1778058962

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 10 metrics, 5 unstable metrics.

See unchanged results

scenario	Δ mean agg_http_req_duration_min	Δ mean agg_http_req_duration_p50	Δ mean agg_http_req_duration_p75	Δ mean agg_http_req_duration_p99	Δ mean throughput
scenario:noprobe	unstable [-22356.617ns; +23657.770ns] or [-7.657%; +8.102%]	unstable [-32.514µs; +35.233µs] or [-9.731%; +10.544%]	unstable [-41.466µs; +47.445µs] or [-11.870%; +13.581%]	unstable [-104.068µs; +111.549µs] or [-8.615%; +9.234%]	same
scenario:basic	same	same	same	unstable [+32.440µs; +259.987µs] or [+3.100%; +24.845%]	same
scenario:loop	same	same	unsure [+6.188µs; +16.515µs] or [+0.068%; +0.182%]	same	same

Request duration reports for reports

gantt
    title reports - request duration [CI 0.99] : candidate=None, baseline=None
    dateFormat X
    axisFormat %s
section baseline
noprobe (334.148 µs) : 306, 362
.   : milestone, 334,
basic (295.659 µs) : 289, 303
.   : milestone, 296,
loop (8.985 ms) : 8980, 8991
.   : milestone, 8985,
section candidate
noprobe (335.507 µs) : 300, 371
.   : milestone, 336,
basic (297.226 µs) : 290, 304
.   : milestone, 297,
loop (8.991 ms) : 8986, 8996
.   : milestone, 8991,

Loading

• baseline results

Scenario	Request median duration [CI 0.99]
noprobe	334.148 µs [306.197 µs, 362.099 µs]
basic	295.659 µs [288.653 µs, 302.665 µs]
loop	8.985 ms [8.98 ms, 8.991 ms]

• candidate results

Scenario	Request median duration [CI 0.99]
noprobe	335.507 µs [299.54 µs, 371.475 µs]
basic	297.226 µs [290.293 µs, 304.159 µs]
loop	8.991 ms [8.986 ms, 8.996 ms]