remove unnecessary div

src/App.vue

@@ -38,11 +38,9 @@
       </div>
       <div class="main">
         <div v-if="!currentUser" class="login-hint panel panel-default">
-          <div class="panel-body">
-            <router-link :to="{ name: 'login' }">
-              {{ $t("login.hint") }}
-            </router-link>
-          </div>
+          <router-link :to="{ name: 'login' }" class="panel-body">
+            {{ $t("login.hint") }}
+          </router-link>
         </div>
         <transition name="fade">
           <router-view></router-view>