refactor(currencies): remove currency's code reference in the UI

app/templates/cotton/ui/currency_card.html

@@ -2,9 +2,6 @@
 {% load i18n %}
 <div class="col card shadow">
   <div class="card-body">
-    <div class="tw-text-sm mb-2">
-      <span class="badge text-bg-primary">{{ currency.currency.code }}</span>
-    </div>
     <h5 class="card-title">
       {{ currency.currency.name }}
     </h5>