s390/nmi: remove unused code

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 3f3cda4..6ff1692 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -191,7 +191,6 @@
 {
 	union ctlreg2 cr2;
 	int kill_task;
-	void *fpt_save_area;
 
 	kill_task = 0;
 
@@ -224,7 +223,6 @@
 		if (!test_cpu_flag(CIF_FPU))
 			kill_task = 1;
 	}
-	fpt_save_area = &S390_lowcore.floating_pt_save_area;
 	if (!mci.fc) {
 		/*
 		 * Floating point control register can't be restored.