follow #109 - removed remnants of error handler added by #18

[lamweili]

#109 dropped the error handler, but there are some remnants of it added by #18 that are not cleaned up. This PR cleans them up and reverts the changes done by #18.

Checklist

• [x] run npm run test ~and npm run benchmark~
• [ ] ~tests and/or benchmarks are included~
• [ ] ~documentation is changed or added~
• [x] commit message and code follows the Developer's Certification of Origin and the Code of conduct