chore(fmt): simplify upstream attribution

Author: chenjiahan

packages/rstack/src/fmt/parallel.ts

@@ -1,8 +1,4 @@
-/**
- * Derived from @prettier/cli v0.12.0.
- * SPDX-License-Identifier: MIT
- * Modified by Rstack contributors.
- */
+// Derived from @prettier/cli, see THIRD_PARTY_NOTICES.md
 
 import { availableParallelism } from 'node:os';
 import WorkTank from 'worktank';

packages/rstack/src/fmt/serial.ts

@@ -1,8 +1,4 @@
-/**
- * Derived from @prettier/cli v0.12.0.
- * SPDX-License-Identifier: MIT
- * Modified by Rstack contributors.
- */
+// Derived from @prettier/cli, see THIRD_PARTY_NOTICES.md
 
 import { readFile, writeFile } from 'atomically';
 import { format } from 'prettier';