fix: remove vitest jsdom comments

Author: EscapedGibbon

src/save/__tests__/encodeBase64.test.ts

@@ -2,9 +2,6 @@ import { createRgbaImage } from '../../../test/testUtils.js';
 import { encode } from '../encode.js';
 import { encodeBase64 } from '../encodeBase64.js';
 
-/**
- * @vitest-environment jsdom
- */
 test('basic image (png)', () => {
   const image = testUtils.createGreyImage([
     [0, 0, 0, 0, 0],