Removed Explore from FooterBar

• Removed:
- Explore from FooterBar as it can now be found in /search on mobile

app/javascript/gabsocial/components/footer_bar.js

@@ -50,13 +50,6 @@ class FooterBar extends ImmutablePureComponent {
         title: 'Groups',
         active: currentPathname.indexOf('/groups') > -1,
       },
-      {
-        to: '/explore',
-        icon: 'explore',
-        title: 'Explore',
-        isHidden: !me,
-        active: currentPathname.indexOf('/explore') > -1,
-      },
       {
         to: '/news',
         icon: 'news',