Clean unused init bytes (#136)

These bytes are remnants from the vanilla rom and aren't used by
anything.  They appear to be either an incorrect version of the Famicom
Disk System Interupt/Reset vector controls, or the correct version of
the same controls for an internal development platform.  Either way they
can be cleaned up.

from: https://www.nesdev.org/wiki/FDS_BIOS#Interrupt/Reset_vector_controls
> Interrupt/Reset vector controls > The FDS BIOS uses 4 bytes at the
> lower end of the stack page to control the behaviour of interrupt/reset
> vectors:
>
> [$0100]:	PC action on NMI. $C0 (NMI #3) on reset.
> [$0101]:	PC action on IRQ. $80 (BIOS acknowledge and delay) on reset.
> [$0102]:	RESET flag. $35 on reset after the boot files have loaded.
> [$0103]:	RESET type. $AC = first boot of the game, $53 = the game was soft-reset by the user.

Author: zohassadar

src/boot.asm

@@ -76,14 +76,6 @@
         sta PPUMASK
         jsr LE006
         jsr updateAudio2
-        lda #$C0
-        sta stack
-        lda #$80
-        sta stack+1
-        lda #$35
-        sta stack+3
-        lda #$AC
-        sta stack+4
         jsr updateAudioWaitForNmiAndDisablePpuRendering
         jsr disableNmi
         jsr drawBlackBGPalette