Remove primer_react_action_list_item_as_button feature flag

[Copilot]

Removes the primer_react_action_list_item_as_button feature flag, which was defaulted to false and served no active purpose. The flag was only used as a test wrapper in stories and tests, not in implementation logic.

Changelog

Removed

• Feature flag primer_react_action_list_item_as_button from DefaultFeatureFlags
• FeatureFlags wrappers from ActionList.features.stories.tsx (2 occurrences)
• FeatureFlags wrapper from NavList.test.tsx
• Unused FeatureFlags imports from affected files

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

No behavioral changes. Flag was always false and only wrapped test code.

Testing & Reviewing

• All existing tests pass (2307 tests)
• Stories render identically without the wrapper
• Type checking, linting, and formatting all pass

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

Original prompt

Create a pull request in primer/react that removes usage and any occurrence of the feature flag or identifier primer_react_action_list_item_as_button across the repository.

Goal

• Eliminate all references to primer_react_action_list_item_as_button from the codebase, including:
  • Feature flag checks
  • Configuration or enablement code
  • Tests that reference it
  • Documentation or comments mentioning it
  • Any related exports/types/constants
• Ensure the repository builds, type-checks, lint-checks, and tests pass after removal.

Scope / Hints

• The repo is a monorepo; primary workspace is packages/react.
• Search for the string across the repo and remove it everywhere.
• If the flag gated different behavior, remove the flag logic and keep the intended default behavior (choose the non-flagged path if the flag is no longer supported), adjusting tests accordingly.

Validation

Run and ensure all pass:

• npm run build
• npm run type-check
• npm test
• npm run lint
• npm run lint:css
• npm run format:diff

Notes

• Update any changelog or release notes if the repo requires it for internal flags removal.

This pull request was created from Copilot chat.

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 2c86375

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[Copilot]

Pull request overview

Removes the unused primer_react_action_list_item_as_button feature flag and its remaining test/story wrappers now that it no longer gates any implementation behavior.

Changes:

• Removed primer_react_action_list_item_as_button from DefaultFeatureFlags.
• Removed FeatureFlags wrappers (and related imports) from ActionList feature stories.
• Removed FeatureFlags wrapper (and related import) from the NavList test.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
packages/react/src/FeatureFlags/DefaultFeatureFlags.ts	Drops the unused flag from the default flag scope.
packages/react/src/ActionList/ActionList.features.stories.tsx	Removes feature-flag wrappers around stories now that the flag is gone.
packages/react/src/NavList/NavList.test.tsx	Removes feature-flag wrapper from a test case (and the unused import).