arch/x86/kernel/ptrace.c: Remove unused arg_offs_table

The related warning from gcc 6.0:

  arch/x86/kernel/ptrace.c:127:18: warning: ‘arg_offs_table’ defined but not used [-Wunused-const-variable]
   static const int arg_offs_table[] = {
                    ^~~~~~~~~~~~~~

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Link: http://lkml.kernel.org/r/1451137798-28701-1-git-send-email-chengang@emindsoft.com.cn


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>