chore: remove unused cross-env dependency (#4810)

Author: noritaka1166

package-lock.json

@@ -63,7 +63,6 @@
     "coffeescript": "^2.7.0",
     "colorette": "^2.0.20",
     "concat-stream": "^2.0.0",
-    "cross-env": "^10.1.0",
     "cspell": "^10.0.1",
     "css-loader": "^7.1.4",
     "del-cli": "^7.0.0",