chore: remove unused dependency

Author: ghiscoding

packages/multiple-select-vanilla/package.json

@@ -77,7 +77,6 @@
   },
   "devDependencies": {
     "autoprefixer": "^10.4.20",
-    "cross-env": "^7.0.3",
     "cssnano": "^7.0.6",
     "esbuild": "^0.24.2",
     "native-copyfiles": "^0.2.1",
@@ -87,4 +86,4 @@
     "tinyglobby": "^0.2.10",
     "typescript": "5.7.3"
   }
-}
+}