YQL-20425: Remove old api code

[Artemonchik]

Changelog entry

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Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

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[github-actions]

⚪ 2025-10-16 11:40:09 UTC Pre-commit check linux-x86_64-release-asan for f0446f3 has started.
⚪ 2025-10-16 11:40:22 UTC Artifacts will be uploaded here
⚪ 2025-10-16 11:44:04 UTC ya make is running...
🟡 2025-10-16 13:54:09 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15648	15117	0	259	252	20

🟢 2025-10-16 13:54:23 UTC Build successful.
🟢 2025-10-16 13:54:49 UTC ydbd size 3.8 GiB changed* by -112 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: c38cbce	merge: f0446f3	diff	diff %
ydbd size	4 033 290 984 Bytes	4 033 290 872 Bytes	-112 Bytes	-0.000%
ydbd stripped size	1 498 016 480 Bytes	1 498 016 416 Bytes	-64 Bytes	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

🟢 2025-10-16 11:40:41 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-10-16 11:41:41 UTC Pre-commit check linux-x86_64-relwithdebinfo for f0446f3 has started.
⚪ 2025-10-16 11:41:54 UTC Artifacts will be uploaded here
⚪ 2025-10-16 11:45:26 UTC ya make is running...
🟡 2025-10-16 13:09:42 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38516	35745	0	2	2743	26

⚪ 2025-10-16 13:09:55 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-10-16 13:28:27 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
583 (only retried tests)	559	0	1	0	23

⚪ 2025-10-16 13:28:32 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-10-16 13:53:00 UTC Tests successful.

Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
569 (only retried tests)	550	0	0	1	18

🟢 2025-10-16 13:53:03 UTC Build successful.
🟢 2025-10-16 13:53:21 UTC ydbd size 2.3 GiB changed* by +616 Bytes, which is < 100.0 KiB vs main: OK

ydbd size dash	main: ed73f44	merge: f0446f3	diff	diff %
ydbd size	2 424 183 328 Bytes	2 424 183 944 Bytes	+616 Bytes	+0.000%
ydbd stripped size	516 068 552 Bytes	516 068 808 Bytes	+256 Bytes	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}