CrateHeader: Remove unnecessary @computed decorator

Author: Turbo87

app/components/crate-header.js

@@ -1,11 +1,9 @@
-import { computed } from '@ember/object';
 import { inject as service } from '@ember/service';
 import Component from '@glimmer/component';
 
 export default class CrateHeader extends Component {
   @service session;
 
-  @computed('args.crate.owner_user', 'session.currentUser.id')
   get isOwner() {
     return this.args.crate.owner_user.findBy('id', this.session.currentUser?.id);
   }