chore: remove Middy.js 4.x

Author: dreamorosi

package-lock.json

@@ -57,7 +57,6 @@
     "husky": "^9.1.7",
     "lint-staged": "^16.1.2",
     "markdownlint-cli2": "^0.18.1",
-    "middy4": "npm:@middy/core@^4.7.0",
     "middy5": "npm:@middy/core@^5.4.3",
     "middy6": "npm:@middy/core@^6.0.0",
     "typedoc": "^0.28.8",