DEV: remove dead export archive action (#25932)

app/assets/javascripts/discourse/app/controllers/user-activity.js

@@ -1,17 +1,13 @@
 import Controller, { inject as controller } from "@ember/controller";
-import { alias } from "@ember/object/computed";
 import { service } from "@ember/service";
-import { exportUserArchive } from "discourse/lib/export-csv";
 import discourseComputed from "discourse-common/utils/decorators";
 import I18n from "discourse-i18n";
 
 export default Controller.extend({
-  dialog: service(),
+  currentUser: service(),
   user: controller(),
   userActionType: null,
 
-  canDownloadPosts: alias("user.viewingSelf"),
-
   @discourseComputed("currentUser.draft_count")
   draftLabel(count) {
     return count > 0
@@ -25,13 +21,4 @@ export default Controller.extend({
       ? I18n.t("pending_posts.label_with_count", { count })
       : I18n.t("pending_posts.label");
   },
-
-  actions: {
-    exportUserArchive() {
-      this.dialog.yesNoConfirm({
-        message: I18n.t("user.download_archive.confirm"),
-        didConfirm: () => exportUserArchive(),
-      });
-    },
-  },
 });