⏪ [#4637] Revert validation change

The validation for `data.values[]` is already applied by `select/edit-validation.ts`. And isn't needed for `selectboxes/edit-validation.ts`.

src/registry/selectboxes/edit-validation.ts

@@ -10,13 +10,9 @@ import {EditSchema} from '../types';
 // object :(
 // so we mark each aspect as optional so that *when* it is provided, we can run the
 // validation
-const valuesSchema = (intl: IntlShape) => ({ values: optionSchema(intl).array().min(1).optional() });
 const buildValuesSchema = (intl: IntlShape) =>
   z.object({
-    ...valuesSchema(intl),
-    // The values list can also appear inside a data object
-    // So repeat the previous rule
-    data: z.object(valuesSchema(intl)).optional(),
+    values: optionSchema(intl).array().min(1).optional(),
     openForms: z.object({
       dataSrc: z.union([z.literal('manual'), z.literal('variable')]),
       // TODO: wire up infernologic type checking