message: Remove unnecessary Subjects validation
diff: import { assert } from '@ember/debug';
  import { set } from '@ember/object';
  import { ValidationObject, ValidatorFunction } from 'ember-changeset-validations';
  -import { validateLength, validatePresence } from 'ember-changeset-validations/validators';
  +import { validatePresence } from 'ember-changeset-validations/validators';
  import translations from 'ember-osf-web/locales/en/translations';
  import DraftRegistration, { DraftMetadataProperties } from 'ember-osf-web/models/draft-registration';
  @@ -80,11 +80,5 @@ export function buildMetadataValidations() {
  set(validationObj, DraftMetadataProperties.Title, notBlank);
  set(validationObj, DraftMetadataProperties.Description, notBlank);
  set(validationObj, DraftMetadataProperties.License, notBlank);
  -
  - const pickOne: ValidatorFunction[] = [validateLength({
  - min: 1,
  - message: translations.validationErrors.mustSelectMinOne,
  - })];
  - set(validationObj, DraftMetadataProperties.Subjects, pickOne);
  return validationObj;
  }
  