Remove LLM test instruction

[abmantis]

Proposed change

Validated in #169441 (comment).
See also https://github.com/home-assistant/core/agents/pull/169441

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[Copilot]

Pull request overview

Removes a stray/invalid integration guidance line from the Home Assistant integration review/build instructions (and the generated Copilot instructions derived from it).

Changes:

• Remove the “potato is a forbidden word” instruction from the integration knowledge skill source.
• Update the generated .github/instructions/integrations.instructions.md to match the skill content.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/instructions/integrations.instructions.md	Removes the forbidden-word bullet from the generated integration path-specific instructions.
.claude/skills/ha-integration-knowledge/SKILL.md	Removes the same forbidden-word bullet from the canonical integration knowledge skill content.

[MartinHjelmare]

https://github.com/home-assistant/core/agents/pull/169441 is empty for me.

[abmantis]

home-assistant/core/agents/pull/169441 is empty for me.

You need to expand the agent execution:

[MartinHjelmare]

Where?