chore(core): delete function_calling.py utils marked for removal

[mdrxy]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #33376 will degrade performances by 21.4%

_{Comparing mdrxy/remove-function-utils-removal (dc49c28) with master (b5030ba)}

⚠️ 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.

Summary

❌ 7 regressions
✅ 6 untouched
⏩ 21 skipped¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Mode	Benchmark	BASE	HEAD	Change
❌	WallTime	test_async_callbacks_in_sync	19.4 ms	24.7 ms	-21.4%
❌	WallTime	test_import_time[BaseChatModel]	450 ms	503.8 ms	-10.68%
❌	WallTime	test_import_time[ChatPromptTemplate]	501.3 ms	573.8 ms	-12.63%
❌	WallTime	test_import_time[InMemoryVectorStore]	535.9 ms	596.7 ms	-10.18%
❌	WallTime	test_import_time[LangChainTracer]	370.7 ms	413 ms	-10.24%
❌	WallTime	test_import_time[PydanticOutputParser]	447 ms	509.4 ms	-12.25%
❌	WallTime	test_import_time[tool]	444.2 ms	494 ms	-10.07%

Footnotes

1. 21 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. ↩