MIPS: traps: remove unused variable

flags is indeed unused.
Signed-off-by: Tony Wu <tung7970@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11699/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -1353,7 +1353,6 @@ asmlinkage void do_cpu(struct pt_regs *regs)
 	unsigned long fcr31;
 	unsigned int cpid;
 	int status, err;
-	unsigned long __maybe_unused flags;
 	int sig;
 
 	prev_state = exception_enter();