Removed some (non-functional) experimental code from exception.c that was breaking 64-bit compile.

exception.c

@@ -27,11 +27,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 //#include <unwind.h>
 #include "unwind-pe.h"
 
-void (*__objc_unhandled_exception)(id) = 0;
-
-__attribute__((weak)) int main(void);
-
-
 #ifdef __ARM_EABI_UNWINDER__
 
 const _Unwind_Exception_Class __objc_exception_class
@@ -455,13 +450,6 @@ PERSONALITY_FUNCTION (int version,
  install_context:
   if (saw_cleanup == 0)
     {
-      if (_Unwind_GetRegionStart(context) == (int)main)
-        {
-          if (__objc_unhandled_exception)
-            {
-              __objc_unhandled_exception(xh->value);
-            }
-        }
       return_object = xh->value;
       if (!(actions & _UA_SEARCH_PHASE))
 	_Unwind_DeleteException(&xh->base);