Remove empty NPC functions, add Default Actions - Abdhaljs ~ Buburimu

[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?

Final followup to #6742

• Removes empty function definitions from NPCs in zones Caedarva Mire ~ Kamihr Drifts
• If applicable, moves default actions to defaultActions script for each zone
• If result of above change is an empty file, remove file

Total results from initial for all related PRs drops us to a bit under 49.2MB usage in Lua cache. Resulting cleanup numbers for code changes is:

Steps to test these changes

No impact to gameplay, default actions should still be displayed