[ShadowBevel] Consolidate conditional logic (#10144)

### WHY are these changes introduced?

Fixes #9965

### WHAT is this pull request doing?

Consolidate se23 logic and styles for `ShadowBevel` Component

### How to 🎩
* Compare production and this PR's chromatic storybook to make sure
styles are the same
* `polarisSummerEditions2023ShadowBevelOptOut` toggle shouldn't do
anything now


[Production](https://storybook.polaris.shopify.com/?path=/story/all-components-shadowbevel--default&globals=polarisSummerEditions2023:true)
[This PR]()

Author: sophschneider

polaris-react/src/components/ShadowBevel/ShadowBevel.stories.tsx

@@ -3,17 +3,13 @@ import type {ComponentMeta} from '@storybook/react';
 import type {BoxProps} from '@shopify/polaris';
 import {Box, BlockStack, InlineCode} from '@shopify/polaris';
 
-import {useFeatures} from '../../utilities/features';
-
 import {ShadowBevel} from './ShadowBevel';
 
 export default {
   component: ShadowBevel,
 } as ComponentMeta<typeof ShadowBevel>;
 
 export function Default() {
-  const {polarisSummerEditions2023} = useFeatures();
-
   const colors: BoxProps[] = [
     {
       background: 'bg-success-strong',
@@ -74,18 +70,17 @@ export function Default() {
         </Box>
       </ShadowBevel>
 
-      {polarisSummerEditions2023 &&
-        colors.map(({background, color}) => (
-          <ShadowBevel
-            key={`${background}-${color}`}
-            boxShadow="md"
-            borderRadius="3"
-          >
-            <Box background={background} color={color} padding="4">
-              {background}
-            </Box>
-          </ShadowBevel>
-        ))}
+      {colors.map(({background, color}) => (
+        <ShadowBevel
+          key={`${background}-${color}`}
+          boxShadow="md"
+          borderRadius="3"
+        >
+          <Box background={background} color={color} padding="4">
+            {background}
+          </Box>
+        </ShadowBevel>
+      ))}
 
       <br />
     </BlockStack>

polaris-react/src/components/ShadowBevel/ShadowBevel.tsx

@@ -3,7 +3,6 @@ import type {BorderRadiusScale, ShadowAlias} from '@shopify/polaris-tokens';
 
 import {getResponsiveValue} from '../../utilities/css';
 import type {ResponsiveProp} from '../../utilities/css';
-import {useFeatures} from '../../utilities/features';
 
 import styles from './ShadowBevel.scss';
 
@@ -34,8 +33,6 @@ export function ShadowBevel(props: ShadowBevelProps) {
     zIndex = '0',
   } = props;
 
-  const {polarisSummerEditions2023ShadowBevelOptOut} = useFeatures();
-
   const Component = as;
 
   return (
@@ -46,13 +43,7 @@ export function ShadowBevel(props: ShadowBevelProps) {
         ...getResponsiveValue(
           'shadow-bevel',
           'content',
-          mapResponsiveProp(bevel, (bevel) => {
-            if (polarisSummerEditions2023ShadowBevelOptOut) {
-              return 'none';
-            }
-
-            return bevel ? '""' : 'none';
-          }),
+          mapResponsiveProp(bevel, (bevel) => (bevel ? '""' : 'none')),
         ),
         ...getResponsiveValue(
           'shadow-bevel',