Remove migrations.enableV2 in 8.0 (elastic#116023)

Author: lukeelmers

src/core/server/saved_objects/saved_objects_config.test.ts

@@ -7,7 +7,6 @@
  */
 
 import { schema, TypeOf } from '@kbn/config-schema';
-import { ConfigDeprecationProvider } from '../config';
 import type { ServiceConfigDescriptor } from '../internal_types';
 
 const migrationSchema = schema.object({
@@ -21,13 +20,10 @@ const migrationSchema = schema.object({
 
 export type SavedObjectsMigrationConfigType = TypeOf<typeof migrationSchema>;
 
-const migrationDeprecations: ConfigDeprecationProvider = ({ unused }) => [unused('enableV2')];
-
 export const savedObjectsMigrationConfig: ServiceConfigDescriptor<SavedObjectsMigrationConfigType> =
   {
     path: 'migrations',
     schema: migrationSchema,
-    deprecations: migrationDeprecations,
   };
 
 const soSchema = schema.object({