Remove unnecessary DMG and SGB checking (#7)

engine/events/heal_machine_anim.asm

@@ -155,13 +155,6 @@ INCBIN "gfx/overworld/heal_machine.2bpp"
 	dbsprite  11,   7, 5, 1, $7d, PAL_OW_TREE | OBP_NUM
 
 .LoadPalettes:
-	call IsCGB
-	jr nz, .cgb
-	ld a, %11100000
-	ldh [rOBP1], a
-	ret
-
-.cgb
 	ld hl, .palettes
 	ld de, wOBPals2 palette PAL_OW_TREE
 	ld bc, 1 palettes
@@ -187,14 +180,6 @@ INCLUDE "gfx/overworld/heal_machine.pal"
 	ret
 
 .FlashPalettes:
-	call IsCGB
-	jr nz, .go
-	ldh a, [rOBP1]
-	xor %00101000
-	ldh [rOBP1], a
-	ret
-
-.go
 	ldh a, [rSVBK]
 	push af
 	ld a, BANK(wOBPals2)

engine/events/mom.asm

@@ -438,7 +438,7 @@ Mom_ContinueMenuSetup:
 	lb bc, PRINTNUM_MONEY | PRINTNUM_LEADINGZEROS | 3, 6
 	call PrintNum
 	call UpdateSprites
-	call CGBOnly_CopyTilemapAtOnce
+	call CopyTilemapAtOnce
 	ret
 
 Mom_Wait10Frames:

engine/events/poisonstep_pals.asm

@@ -1,30 +1,8 @@
 LoadPoisonBGPals:
 	call .LoadPals
-	ldh a, [hCGB]
-	and a
-	ret nz
-	; code was probably dummied out here
 	ret
 
 .LoadPals:
-	ldh a, [hCGB]
-	and a
-	jr nz, .cgb
-	ld a, [wTimeOfDayPal]
-	maskbits NUM_DAYTIMES
-	cp DARKNESS_F
-	ld a, %00000000
-	jr z, .convert_pals
-	ld a, %10101010
-
-.convert_pals
-	call DmgToCgbBGPals
-	ld c, 4
-	call DelayFrames
-	farcall _UpdateTimePals
-	ret
-
-.cgb
 	ldh a, [rSVBK]
 	push af
 	ld a, BANK(wBGPals2)