x86: Remove TRAP_INSTR from the public headers.

Direct hypercall traps (rather than using the hypercall transfer page)
was long obsolete even when TRAP_INSTR was deprecated in the API
headers. No current guest will be, or should be, using TRAP_INSTR.

Signed-off-by: Keir Fraser <keir@xen.org>

xen/include/public/arch-x86/xen-x86_32.h

@@ -36,15 +36,6 @@
  * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx)
  */
 
-#if __XEN_INTERFACE_VERSION__ < 0x00030203
-/*
- * Legacy hypercall interface:
- * As above, except the entry sequence to the hypervisor is:
- *  mov $hypercall-number*32,%eax ; int $0x82
- */
-#define TRAP_INSTR "int $0x82"
-#endif
-
 /*
  * These flat segments are in the Xen-private section of every GDT. Since these
  * are also present in the initial GDT, many OSes will be able to avoid

xen/include/public/arch-x86/xen-x86_64.h

@@ -36,16 +36,6 @@
  * Clobbered: argument registers (e.g., 2-arg hypercall clobbers %rdi,%rsi)
  */
 
-#if __XEN_INTERFACE_VERSION__ < 0x00030203
-/*
- * Legacy hypercall interface:
- * As above, except the entry sequence to the hypervisor is:
- *  mov $hypercall-number*32,%eax ; syscall
- * Clobbered: %rcx, %r11, argument registers (as above)
- */
-#define TRAP_INSTR "syscall"
-#endif
-
 /*
  * 64-bit segment selectors
  * These flat segments are in the Xen-private section of every GDT. Since these