target/s390x/cpu.h: Remove unused SIGP_MODE defines

These are unused since commit 075e52b8 ("s390x/cpumodel:
we are always in zarchitecture mode") and it's unlikely that we
will ever need them again. So let's simply remove them now.

Message-Id: <20211015124219.1330830-1-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

target/s390x/cpu.h

@@ -674,11 +674,6 @@ QEMU_BUILD_BUG_ON(sizeof(SysIB) != 4096);
 #define SIGP_STAT_INVALID_ORDER     0x00000002UL
 #define SIGP_STAT_RECEIVER_CHECK    0x00000001UL
 
-/* SIGP SET ARCHITECTURE modes */
-#define SIGP_MODE_ESA_S390 0
-#define SIGP_MODE_Z_ARCH_TRANS_ALL_PSW 1
-#define SIGP_MODE_Z_ARCH_TRANS_CUR_PSW 2
-
 /* SIGP order code mask corresponding to bit positions 56-63 */
 #define SIGP_ORDER_MASK 0x000000ff