separate featureset into instancecapabilites store

src/components/settings_modal/tabs/composing_tab.js

@@ -1,4 +1,4 @@
-import { mapState } from 'vuex'
+import { mapState } from 'pinia'
 
 import FontControl from 'src/components/font_control/font_control.vue'
 import InterfaceLanguageSwitcher from 'src/components/interface_language_switcher/interface_language_switcher.vue'
@@ -29,12 +29,6 @@ import {
 library.add(faGlobe, faMessage, faPenAlt, faDatabase, faSliders)
 
 const ComposingTab = {
-  props: {
-    parentCollapsed: {
-      required: true,
-      type: Boolean,
-    },
-  },
   data() {
     return {
       subjectLineOptions: ['email', 'noop', 'masto'].map((mode) => ({
@@ -132,9 +126,7 @@ const ComposingTab = {
       },
     },
     ...SharedComputedObject(),
-    ...mapState(useInstanceStore, {
-      blockExpirationSupported: (store) => store.featureSet.blockExpiration,
-    }),
+    ...mapState(useInstanceStore, ['blockExpiration']),
   },
   methods: {
     changeDefaultScope(value) {