BREAKING CHANGE(web-react): Set Stack default spacing to zero #DS-741

The feature class enabling this behavior was removed.

 ## Migration Guide

If you need the `Stack` to have a spacing, add
`hasSpacing` prop. By default, `Stack` has zero
inner spacing.

- `<Stack …>` → `<Stack hasSpacing …>`

If you already used the feature class, you can remove it
and don't need to do any other changes.

Please refer back to this guide or reach out to our team
if you encounter any issues during migration.

.storybook/preview.js

@@ -1,7 +1,6 @@
 import SpiritTheme from './spirit.theme';
 import '../.storybook/assets/stylesheets/index.scss';
 import { IconGlobalDecorator } from './decorators/IconGlobalDecorator';
-import { BodyClassDecorator } from './decorators/BodyClassDecorator';
 
 export const parameters = {
   actions: { argTypesRegex: '^on[A-Z].*' },
@@ -23,5 +22,4 @@ export const parameters = {
 
 export const decorators = [
   IconGlobalDecorator,
-  BodyClassDecorator,
 ];

packages/web-react/src/components/Stack/stories/Stack.tsx

@@ -24,7 +24,6 @@ Story.args = {
     </>
   ),
   elementType: 'ul',
-  hasSpacing: true,
 };
 
 export default Story;