fix: Remove remaining default configuration.

[tank-500m]

Description

Removed the remaining default configuration.
OTLP exporter’s default load balancing is intended to be round_robin.

Link to tracking issue

Fixes #
#14090

Testing

Documentation

[dmitryax]

Please document this change better with all side effects and add a changelog item

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

✅ 61 untouched benchmarks
⏩ 20 skipped benchmarks¹

---

_{Comparing tank-500m:fix-otlp-default-balancer (2a325cf) with main (55399d4)}

Footnotes

1. 20 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. ↩

[tank-500m]

fix missing test...

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.82%. Comparing base (55399d4) to head (2a325cf).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14351      +/-   ##
==========================================
- Coverage   91.85%   91.82%   -0.03%     
==========================================
  Files         677      677              
  Lines       42680    42679       -1     
==========================================
- Hits        39203    39190      -13     
- Misses       2423     2431       +8     
- Partials     1054     1058       +4     

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[tank-500m]

How should I fix contrib-test?

[evan-bradley]

@tank-500m Would you be willing to create a follow-up PR to fix the errors? We will likely merge this PR first, update the version of the core libraries used in contrib, then update the expected error message in the failing tests.

[tank-500m]

@evan-bradley
yes I’ll give it a try

[tank-500m]

@evan-bradley yes I’ll give it a try

It seems to be fixed now.

[otelbot]

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