CRIS: remove unused current_regs

CC: Mikael Starvik <starvik@axis.com>
CC: linux-cris-kernel@axis.com
Signed-off-by: NJonas Bonn <jonas@southpole.se>
Signed-off-by: NJesper Nilsson <jesper.nilsson@axis.com>

arch/cris/include/asm/processor.h

@@ -47,7 +47,6 @@ struct task_struct;
  */
 
 #define task_pt_regs(task) user_regs(task_thread_info(task))
-#define current_regs() task_pt_regs(current)
 
 unsigned long get_wchan(struct task_struct *p);