chore(CheckboxOrRadioGroup): Remove the CSS modules feature flag from the CheckboxOrRadioGroup component

[jonrohan]

Closes https://github.com/github/primer/issues/4305

Changelog

New

Changed

Removed

Remove the CSS modules feature flag from the CheckboxOrRadioGroup component

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: 2140190

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	Minor

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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	98.74 KB (-0.16% 🔽)
packages/react/dist/browser.umd.js	98.97 KB (-0.23% 🔽)

[primer-integration]

👋 Hi from github/github! Your integration PR is ready: https://github.com/github/github/pull/376643

[primer-integration]

🟢 golden-jobs completed with status success.

[Copilot]

Pull Request Overview

This PR removes the now-obsolete CSS modules feature flag and all associated conditional rendering from the CheckboxOrRadioGroup component and its subcomponents, simplifying them to always use CSS modules and the new BoxWithFallback wrapper.

• Remove the CSS_MODULES_FLAG feature flag and related imports
• Simplify CheckboxOrRadioGroupLabel and CheckboxOrRadioGroupCaption to a single implementation path
• Replace the toggled styled component in CheckboxOrRadioGroup with BoxWithFallback and drop conditional branches

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/react/src/internal/components/CheckboxOrRadioGroup/FeatureFlag.tsx	Deleted feature flag constant
packages/react/src/internal/components/CheckboxOrRadioGroup/CheckboxOrRadioGroupLabel.tsx	Removed feature-flag branches and imports
packages/react/src/internal/components/CheckboxOrRadioGroup/CheckboxOrRadioGroupCaption.tsx	Removed feature-flag branches and imports
packages/react/src/internal/components/CheckboxOrRadioGroup/CheckboxOrRadioGroup.tsx	Replaced toggleStyledComponent logic with BoxWithFallback; removed conditional branches
.changeset/afraid-pens-return.md	Added changeset recording removal of the feature flag

Comments suppressed due to low confidence (2)

packages/react/src/internal/components/CheckboxOrRadioGroup/CheckboxOrRadioGroup.tsx:117

• Remove the as: 'div' property from the props spread on this <div> wrapper, since it renders a native <div> and the as attribute is invalid HTML.

as: 'div',

packages/react/src/internal/components/CheckboxOrRadioGroup/CheckboxOrRadioGroupLabel.tsx:23

• The sx prop is being destructured but never passed through to VisuallyHidden. Either forward sx={sx} or remove it from the component signature.

sx,