Delete mcr.c

There's no need for that anymore.

src/chipset/mcr.c

@@ -1,38 +0,0 @@
-/*INTEL 82355 MCR emulation
-  This chip was used as part of many 386 chipsets
-  It controls memory addressing and shadowing*/
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
-#include <wchar.h>
-#include <86box/86box.h>
-#include <86box/mem.h>
-
-
-int nextreg6;
-uint8_t mcr22;
-int mcrlock,mcrfirst;
-
-
-void resetmcr(void)
-{
-        mcrlock=0;
-        mcrfirst=1;
-        shadowbios=0;
-}
-
-void writemcr(uint16_t addr, uint8_t val)
-{
-        switch (addr)
-        {
-                case 0x22:
-                if (val==6 && mcr22==6) nextreg6=1;
-                else                    nextreg6=0;
-                break;
-                case 0x23:
-                if (nextreg6) shadowbios=!val;
-                break;
-        }
-        mcr22=val;
-}
-