Data list - remove custom styles for width modifiers examples

[mcoker]

With penta, the global vars that create these react-tokens that are used for custom styles will be removed, so we'll want to address that before penta is released (or whenever core removes the global vars and the react-tokens break).

The custom styles are used in the width modifiers example, but core has an equivalent example without custom styles, so I think we can just remove the custom stuff on the react side.

patternfly-react/packages/react-core/src/components/DataList/examples/DataList.md

Lines 26 to 29 in 3a88c11

	import global_Color_100 from '@patternfly/react-tokens/dist/esm/global_Color_100';
	import global_BackgroundColor_200 from '@patternfly/react-tokens/dist/esm/global_BackgroundColor_200';
	import global_BorderColor_100 from '@patternfly/react-tokens/dist/esm/global_BorderColor_100';
	import global_BorderWidth_sm from '@patternfly/react-tokens/dist/esm/global_BorderWidth_sm';

patternfly-react/packages/react-core/src/components/DataList/examples/DataListWidthModifiers.tsx

Lines 23 to 26 in 3a88c11

	import global_Color_100 from '@patternfly/react-tokens/dist/esm/global_Color_100';
	import global_BackgroundColor_200 from '@patternfly/react-tokens/dist/esm/global_BackgroundColor_200';
	import global_BorderColor_100 from '@patternfly/react-tokens/dist/esm/global_BorderColor_100';
	import global_BorderWidth_sm from '@patternfly/react-tokens/dist/esm/global_BorderWidth_sm';

patternfly-react/packages/react-core/src/components/DataList/examples/DataListWidthModifiers.tsx

Lines 49 to 56 in 3a88c11

	const previewPlaceholder = {
	display: 'block',
	width: '100%',
	padding: '.25rem .5rem',
	color: global_Color_100.var,
	backgroundColor: global_BackgroundColor_200.var,
	border: `${global_BorderWidth_sm.var} ${global_BorderColor_100.var} solid`
	};

And anywhere previewPlaceholder is referenced

[tlabaj]

closed by #10117