remove direct upload

app/javascript/form.js

@@ -11,7 +11,6 @@ window.customElements.define('submission-form', class extends HTMLElement {
     this.app = createApp(Form, {
       submitter: JSON.parse(this.dataset.submitter),
       canSendEmail: this.dataset.canSendEmail === 'true',
-      isDirectUpload: this.dataset.isDirectUpload === 'true',
       goToLast: this.dataset.goToLast === 'true',
       isDemo: this.dataset.isDemo === 'true',
       attribution: this.dataset.attribution !== 'false',