Remove the now-redundant comments

[Rangi42]

Many lines have comments that are trivial if you know the basics of GBZ80 assembly. Some also appear to have been added before functions and variables had meaningful labels. For example:

• ldh [hMapROMBank], a ; save map ROM bank
• call PrintStatusAilment ; print status condition

	ld a, [wListPointer]
	ld l, a
	ld a, [wListPointer + 1]
	ld h, a ; hl = address of the list

Some will also be redundant once we add more labels and constants. For example, bit 0, a ; was the A button pressed? should be bit BIT_A_BUTTON, a.

[Rangi42]

Some regexes that help find many instances of redundant comments:

• git grep -P '^\t(ld [abcdehl],|call( n?[zc],)?|j[pr]( n?[zc],)?|cp) [A-Z][A-Za-z0-9_]+ ; '
• git grep -P '^\tldh? a, \[[whv][A-Z].+\] ; '
• git grep -P '^\t(bit|res|set) [A-Z][A-Za-z0-9_]+, \S+ ; '

(Those turn up hundreds of lines, and many of them are false positives, useful comments that we should keep or maybe reword or occasionally turn into ASSERTs.)