refactor: remove unneeded isnan checks

[Planeshifter]

Description

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This pull request

• removes a redundant isnan(N)||isnan(K)||isnan(n) guard and the associated @stdlib/math/base/assert/is-nan require from stats/base/dists/hypergeometric/mean. All other packages in the distribution namespace rely solely on the !isNonNegativeInteger predicate to reject NaN inputs — !isNonNegativeInteger(NaN) is true.

Related Issues

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No.

Questions

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Other

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Output of a cross-package drift-detection routine over a randomly selected stdlib namespace (stats/base/dists/hypergeometric, seed 1776774012099). See the local drift report for the full per-feature tally, excluded findings, and agent verdicts. Draft PR: a maintainer should audit before promoting to ready-for-review.

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• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

Claude Code executed a cross-package drift-detection routine that randomly selected the stats/base/dists/hypergeometric namespace (seed 1776774012099), extracted structural and semantic features across the 11 sibling packages, computed majority patterns, and identified outliers. Three validation agents (opus × 2, sonnet × 1) independently verified each drift candidate; only findings classified as confirmed-drift by all relevant agents were applied as mechanical, behavior-preserving patches. A maintainer must audit before promoting from draft.

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[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/hypergeometric/mean	$\color{green}194/194$ $\color{green}+100.00%$	$\color{green}13/13$ $\color{green}+100.00%$	$\color{green}2/2$ $\color{green}+100.00%$	$\color{green}194/194$ $\color{green}+100.00%$

The above coverage report was generated for the changes in this PR.