remove vuetifycss and materialicon -> use threeshake

@nuxt/vuetify etc...

components/Announcement.vue

@@ -1,15 +1,16 @@
 <template lang="pug">
   nuxt-link(:to='`/announcement/${announcement.id}`')
-    v-alert.mb-1(border='left' type='info' color="primary" show-icon) {{announcement.title}}
+    v-alert.mb-1(border='left' type='info' color="primary" :icon='mdiInformation') {{announcement.title}}
 
 </template>
 <script>
-import { mapState } from 'vuex'
-
+import { mdiInformation } from '@mdi/js'
 export default {
+  data () {
+    return { mdiInformation }
+  },
   props: {
     announcement: { type: Object, default: () => ({}) }
-  },
-  computed: mapState(['announcements'])
+  }
 }
 </script>