To-do (eventually): Clean up unused strings, code, etc

[BuffelSaft]

I've noticed a handful of things in the battle engine that are completely unused. e.g. there are strings specific to Flame Orb and Toxic Orb, but neither are used when the orbs activate. There are also a handful of battle scripts and battel scripting commands that aren't were replaced without deleting the old versions.

Wold be good to clean all this up one day, once we've run out of actual issues.