Remove @vitest/browser package

Author: leeyi45

lib/buildtools/package.json

@@ -19,7 +19,6 @@
   "dependencies": {
     "@sourceacademy/modules-repotools": "workspace:^",
     "@vitejs/plugin-react": "^4.5.1",
-    "@vitest/browser": "^3.2.3",
     "@vitest/coverage-v8": "^3.2.3",
     "acorn": "^8.8.1",
     "astring": "^1.8.6",

yarn.lock

@@ -3655,7 +3655,6 @@ __metadata:
     "@types/lodash": "npm:^4.14.198"
     "@types/node": "npm:^22.15.30"
     "@vitejs/plugin-react": "npm:^4.5.1"
-    "@vitest/browser": "npm:^3.2.3"
     "@vitest/coverage-v8": "npm:^3.2.3"
     acorn: "npm:^8.8.1"
     astring: "npm:^1.8.6"