fix(dataviews): remove unimported React.ComponentType from story decorator

The registerLayout story annotated its decorator param as
React.ComponentType but never imported React. TypeScript failed to
compile the file, which caused Storybook to silently drop the story
from the sidebar (pre-commit ESLint doesn't run tsc).

Let Storybook infer the Story param type from Meta<typeof DataViews>.

Refs: none

Author: mordeth

packages/dataviews/src/stories/register-layout-poc.story.tsx

@@ -215,7 +215,7 @@ const meta = {
 	component: DataViews,
 	parameters: { layout: 'fullscreen' },
 	decorators: [
-		( Story: React.ComponentType ) => (
+		( Story ) => (
 			<div style={ { maxWidth: 660, margin: '1rem auto' } }>
 				<h2 style={ { margin: '0 0 8px' } }>Offline payment methods</h2>
 				<p