fix(uishell): remove navbar footer

src/components/UIShell/SideNav/SideNav.svelte

@@ -3,8 +3,6 @@
   export let isOpen = undefined;
 
   import { cx } from '../../../lib';
-  import Icon from '../../Icon/Icon.svelte';
-  import { closeIcon } from '../constants';
 
   $: footerSpanText = isOpen ? 'Open' : 'Close';
 </script>
@@ -13,12 +11,4 @@
   class={cx('--side-nav__navigation', '--side-nav', '--side-nav--ux', isOpen && '--side-nav--expanded')}
   aria-label={ariaLabel}>
   <slot />
-  <footer class={cx('--side-nav__footer')}>
-    <button class={cx('--side-nav__toggle')} type="button" title="Open">
-      <div class={cx('--side-nav__icon')}>
-        <Icon {...closeIcon} />
-      </div>
-      <span class={cx('--assistive-text')}>{footerSpanText}</span>
-    </button>
-  </footer>
 </nav>