docs: remove unrelevant notes

Author: pawel-id

NOTES.md

@@ -1,44 +1,5 @@
 # Notes to self
 
-## ESM migration
-
-### settings
-
-| file - setting                  | commonjs | esm           |
-| ------------------------------- | -------- | ------------- |
-| package.json - type             | commonjs | module        |
-| tsconfig.json - module          | commonjs | es2020        |
-| tsconfig.json - esModuleInterop | true     | not required? |
-
-### exporting modules
-
-src/index.ts
-
-commonjs
-
-```javascript
-import { default as Bir } from './bir'
-export = Bir
-```
-
-esm
-
-```javascript
-import Bir from "./bir.js";
-export default Bir;
-```
-
-### \_\_dirname
-
-definie \_\_dirname missing in esm
-
-```javascript
-import path from "path";
-import { fileURLToPath } from "url";
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = path.dirname(__filename);
-```
-
 ## API documentation
 
 consider to use