Remove deprecated flavor sampling rate of 22500

[hagenw]

Closes #484

In #484 we promised to remove the deprecated flavor sampling rate of 22500 Hz in version 1.13.0. As we have now released version 1.13.0, it's time to remove it.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Removes support for the deprecated 22500 Hz flavor sampling rate and its warning, enforcing only the officially supported sampling rates and cleaning up the corresponding test.

Flow diagram for updated sampling_rate validation in flavor init

flowchart TD
    A[sampling_rate passed to __init__] --> B{sampling_rate is not None}
    B -- no --> Z[Return without sampling_rate]
    B -- yes --> C[Cast sampling_rate to int]
    C --> D{sampling_rate in define.SAMPLING_RATES}
    D -- yes --> E[Continue initialization]
    D -- no --> F[raise ValueError]

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File-Level Changes

Change	Details	Files
Remove special handling and deprecation warning for 22500 Hz sampling rate when constructing a Flavor.	Stop importing the warnings module in the flavor implementation. Simplify sampling_rate validation by removing the 22500 Hz special-case branch and treating it as invalid if not in the supported list. Keep raising ValueError for any sampling_rate not in define.SAMPLING_RATES.	audb/core/flavor.py
Delete the test that ensured 22500 Hz emitted a deprecation warning.	Remove the test that expected a UserWarning when using sampling_rate=22500 in Flavor initialization.	tests/test_flavor.py

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#484	Remove support for the deprecated sampling rate of 22500 Hz in audb version 1.13.0 (so that 22500 Hz is no longer an allowed flavor sampling rate, and associated deprecation warning behavior/tests are removed).	✅

Possibly linked issues

• Remove deprecated sampling rate of 22500 Hz in version 1.13.0 #484: The PR removes support, warnings, and tests for the deprecated 22500 Hz sampling rate as specified in the issue.

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