make codegen API private

Author: mizdra

packages/codegen/package.json

@@ -12,14 +12,6 @@
   "author": "mizdra <pp.mizdra@gmail.com>",
   "license": "MIT",
   "private": false,
-  "exports": {
-    ".": {
-      "default": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
-      }
-    }
-  },
   "scripts": {
     "build": "tsc -b tsconfig.build.json"
   },