Comment more ROM labels as unreferenced

(Some unreferenced labels are above code which is still used via fallthrough!)

home/menu.asm

@@ -282,8 +282,9 @@ MenuBoxCoord2Attr::
 	ld c, a
 	ld a, [wMenuBorderTopCoord]
 	ld b, a
+	; fallthrough
 
-Coord2Attr::
+Coord2Attr:: ; unreferenced
 ; Return the address of wAttrmap(c, b) in hl.
 	xor a
 	ld h, a
@@ -835,7 +836,7 @@ InterpretBattleMenu::
 	ld a, [wMenuCursorBuffer]
 	ret
 
-InterpretMobileMenu::
+InterpretMobileMenu:: ; unreferenced
 	ldh a, [hROMBank]
 	ld [wMenuData_2DMenuItemStringsBank], a
 	farcall _InterpretMobileMenu