chore(telemetry): remove redundant lib_language tag in telemetry

[smola]

Avoid setting lib_language tag explicitly on telemetry. This tag is automatically added to all telemetry data based on the HTTP header DD-Client-Library-Language.

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

ddtrace/appsec/_iast/_metrics.py                                        @DataDog/asm-python
ddtrace/appsec/_metrics.py                                              @DataDog/asm-python
ddtrace/internal/telemetry/logging.py                                   @DataDog/apm-core-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 233 ± 4 ms.

The average import time from base is: 239 ± 5 ms.

The import time difference between this PR and base is: -6.0 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.257 ms (0.97%)

ddtrace.bootstrap.sitecustomize 1.573 ms (0.67%)

ddtrace.bootstrap.preload 1.573 ms (0.67%)

ddtrace.internal.products 1.573 ms (0.67%)

ddtrace.internal.remoteconfig.client 0.695 ms (0.30%)

ddtrace 0.685 ms (0.29%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-04-21 13:45:34

Comparing candidate commit 5110136 in PR branch smola/remove-redundant-temetry-tags with baseline commit 997a12e in branch main.

Found 0 performance improvements and 1 performance regressions! Performance is the same for 471 metrics, 8 unstable metrics.

scenario:telemetryaddmetric-flush-1-metric

• 🟥 execution_time [+352.410ns; +475.299ns] or [+8.190%; +11.046%]