chore(FilteredActionList): remove modern action list FF

[francinelucca]

Closes https://github.com/github/primer/issues/5448

Changelog

Removed

• All modern_action_list logic from the codebase
• deprecated FilteredActionList in favor of modern FilteredActionList

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

Testing & Reviewing

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)

[changeset-bot]

🦋 Changeset detected

Latest commit: ba34508

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

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[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github depends on. If you are GitHub staff, we recommend testing these changes with github/github using the integration workflow. Thanks!

[github-actions]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	89.39 KB (-3.12% 🔽)
packages/react/dist/browser.umd.js	89.64 KB (-3.04% 🔽)

[github-actions]

👋 Hi, there are new commits since the last successful integration test. We recommend running the integration workflow once more, unless you are sure the new changes do not affect github/github. Thanks!

[primer-integration]

👋 Hi from github/github! Your integration PR is ready: https://github.com/github/github/pull/393002

[Copilot]

Pull Request Overview

This PR removes the primer_react_select_panel_with_modern_action_list feature flag that controlled which ActionList implementation to use in SelectPanel and FilteredActionList components. The modern ActionList implementation is now the default (and only) implementation.

• Removed the feature flag and associated conditional logic throughout the codebase
• Cleaned up deprecated ActionList imports and type dependencies
• Updated exports to expose necessary types from FilteredActionList directly
• Simplified test files by removing feature flag toggling and duplicate test scenarios

Reviewed Changes

Copilot reviewed 17 out of 192 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/react/src/index.ts	Added new type exports for SelectPanel-related types
packages/react/src/tests/snapshots/exports.test.ts.snap	Updated snapshot to reflect new exported types
packages/react/src/SelectPanel/types.ts	Removed file that re-exported deprecated ActionList types
packages/react/src/SelectPanel/index.ts	Updated to export types from FilteredActionList instead of deprecated types
packages/react/src/SelectPanel/SelectPanel.tsx	Removed feature flag usage and cleaned up conditional logic
packages/react/src/SelectPanel/SelectPanel.test.tsx	Removed feature flag testing and simplified test structure
packages/react/src/SelectPanel/SelectPanel.features.stories.tsx	Removed FeatureFlags wrapper
packages/react/src/FilteredActionList/useAnnouncements.tsx	Updated import path for types
packages/react/src/FilteredActionList/types.ts	Added comprehensive type definitions for FilteredActionList
packages/react/src/FilteredActionList/index.ts	Updated exports to include all necessary types
packages/react/src/FilteredActionList/FilteredActionListWithDeprecatedActionList.tsx	Removed deprecated implementation
packages/react/src/FilteredActionList/FilteredActionListEntry.tsx	Removed feature flag entry point
packages/react/src/FilteredActionList/FilteredActionList.tsx	Updated to be the primary implementation
packages/react/src/FeatureFlags/DefaultFeatureFlags.ts	Removed the feature flag definition
packages/react/src/CircleBadge/snapshots/CircleBadge.test.tsx.snap	Updated styled-components class names
e2e/components/SelectPanel.test.ts	Removed feature flag scenarios from e2e tests
.changeset/dirty-bulldogs-smoke.md	Added changeset for patch release

Comments suppressed due to low confidence (1)

packages/react/src/SelectPanel/SelectPanel.tsx:363

• There is an extra closing brace that creates a syntax error. This brace should be removed as it doesn't have a corresponding opening brace.

    }

[primer-integration]

🟢 golden-jobs completed with status success.

[hectahertz]

Finally ✨