Removed targets and configurations that are no longer functional

and not likely to become so.  Comments on each configuration
are below.

  + Force CPU386 - This BSP was developed as part of the initial
    port of RTEMS to the i386.  This board has been unavailable
    for a long time now.

  + GO32 - This BSP and some CPU code supported djgpp v1.x.  This
    version is now quite old.  No one has stepped forward to
    update the code to v2.x which may be technically impossible
    anyway.  More importantly, go32 has been superceded by the pc386 BSP.

c/src/exec/score/cpu/i386/asm.h

@@ -43,19 +43,6 @@
  *  have to define these as appropriate.
  */
 
-/*
- *  Go32 suffers the same bug as __REGISTER_PREFIX__ 
- */
- 
-#if __GO32__
-#undef  __USER_LABEL_PREFIX__
-#define __USER_LABEL_PREFIX__ _
-#endif
-
-#ifndef __USER_LABEL_PREFIX__
-#define __USER_LABEL_PREFIX__ _
-#endif
-
 /*
  *  Looks like there is a bug in gcc 2.6.2 where this is not
  *  defined correctly when configured as i386-coff and

c/src/exec/score/cpu/i386/cpu_asm.S

@@ -209,12 +209,6 @@ DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (17)
 DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (18)
 	
 
-/*
- *  GO32 does not require these segment related routines.
- */
-
-#ifndef __GO32__
-
 /*
  *  void *i386_Logical_to_physical(
  *     rtems_unsigned16  segment,
@@ -275,7 +269,6 @@ SYM (i386_Physical_to_logical):
         subl    eax,ecx                # ecx = logical address equivalent
         movl    ecx,eax                # eax = ecx
         ret
-#endif /* __GO32__ */
 
 END_CODE