For unknown reasons, the text pointer list for Oak's Lab is duplicated. This is currently implemented by treating the two text pointer lists as one large list. This leads to duplicate labels and some confusing logic. Refactor the code to treat the two text pointer lists separately. This lets us remove several labels. It also makes the code which sets the text pointer list self-documenting.
fix trainer header numbering
except for wram.asm and sram.asm also delete unused yellow file