s390: remove math emulation code

The last in-kernel user is gone so we can finally remove this code.

Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/dis.c

@@ -26,7 +26,6 @@
 #include <asm/dis.h>
 #include <asm/io.h>
 #include <linux/atomic.h>
-#include <asm/mathemu.h>
 #include <asm/cpcmd.h>
 #include <asm/lowcore.h>
 #include <asm/debug.h>