fix: Remove un-used org.json (again)

[vorburger]

Fixes

This was already (correctly) removed in https://github.com/twilio/twilio-java/pull/743/files, but it was then added again (wrongly, as not needed) in https://github.com/twilio/twilio-java/pull/741.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [X] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [X] I have read the Contribution Guidelines and my PR follows them
• [X] I have titled the PR appropriately
• [X] I have updated my branch with the main branch
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added the necessary documentation about the functionality in the appropriate .md file
• [ ] I have added inline documentation to the code I modified

[vorburger]

@AsabuHere or @kridai @manisha1997 @tiwarishubham635 please review and merge?