(Popover): pass static classnames statically

Author: msmx-mnakagawa

stories/Popover.stories.tsx

@@ -5,7 +5,6 @@ import {
   ComponentStoryObj,
   DecoratorFn,
 } from '@storybook/react';
-import classNames from 'classnames';
 
 /**
  *
@@ -21,12 +20,7 @@ const paddingDecorator: DecoratorFn = (story) => (
       padding: '100px 350px',
     }}
   >
-    <div
-      className={classNames(
-        'slds-dropdown-trigger',
-        'slds-dropdown-trigger_click'
-      )}
-    >
+    <div className='slds-dropdown-trigger slds-dropdown-trigger_click'>
       <Button type='icon' icon='question' />
       {story()}
     </div>