chore: 🤖 Remove rose-badge light style definition

After discussing with designer, badge style does not need a defined
"light" style.

addons/rose/addon/components/rose/badge.stories.mdx

@@ -10,10 +10,10 @@ import { text, select } from '@storybook/addon-knobs';
 A badge component that supports icons and predefined styles.
 When style definition isn't supplied, a default style will be supplied.
 
-Styles: outline, light, dark, informational, informational-outline, success, success-outline, error, error-outline, warning, warning-outline, alert, alert-outline
+Styles: outline, dark, informational, informational-outline, success, success-outline, error, error-outline, warning, warning-outline, alert, alert-outline
 
 ```html
-<Rose::Badge @style="outline" @icon="user-organization"/>
+<Rose::Badge @style="outline" @icon="user-organization">Badge</Rose::Badge>
 ```
 
 <Preview>
@@ -28,7 +28,6 @@ Styles: outline, light, dark, informational, informational-outline, success, suc
       style: select('style', {
           'none': 'none',
           'outline': 'outline',
-          'light': 'light',
           'dark': 'dark',
           'informational': 'informational',
           'informational-outline': 'informational-outline',
@@ -60,7 +59,6 @@ Styles: outline, light, dark, informational, informational-outline, success, suc
     <Rose::Badge>default style</Rose::Badge>
     <Rose::Badge @style="outline">outline</Rose::Badge>
     <Rose::Badge @icon="user-organization">default style with icon</Rose::Badge>
-    <Rose::Badge @style="light">light</Rose::Badge>
     <Rose::Badge @style="dark">dark</Rose::Badge>
     <Rose::Badge @style="informational">informational</Rose::Badge>
     <Rose::Badge @style="informational-outline">informational-outline</Rose::Badge>

addons/rose/addon/styles/rose/components/_badge.scss

@@ -21,11 +21,6 @@
     --border-color: var(--ui-gray-starker-1);
   }
 
-  &.rose-badge-light {
-    --border-color: var(--ui-gray-subtler-5);
-    --background-color: var(--ui-gray-starker-5);
-  }
-
   &.rose-badge-dark {
     --color: var(--ui-gray-subtler-6);
     --border-color: var(--ui-gray-starker-1);

addons/rose/tests/integration/components/rose/badge-test.js

@@ -24,7 +24,6 @@ module('Integration | Component | rose/badge', function(hooks) {
   test('it styles content using @style', async function(assert) {
     let styles = [
       'outline',
-      'light',
       'dark',
       'informational',
       'informational-outline',