Fix various lua styling errors

[claywar]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Corrects the following Lua styling errors after running locally:

• Removes trailing whitespace from Kingdom Earring
• Removes unused global variable in Unfettered Twitherym
• Removes whitespace-only line in Yuhtunga Jungle Zone.lua
• Replaces double-quotes with single-quotes

Steps to test these changes

No impact to existing gameplay