Core SF Code unused

[awilliamson]

Functions such as SF.iterScriptHook aren't used really. As internally we use the Tbl alternative. There's a few cases within the core where functionality was added but is never used.

I'll be going through the Core to see what can be removed or factored out. Cutting the core down to a more manageable code base should improve readability and hopefully clear up the design, this then enables easier refactoring in the future.