linux-user: Remove #if 0 block in syscall_defs.h

These definitions are in sparc/signal.c.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

linux-user/syscall_defs.h

@@ -547,30 +547,6 @@ typedef union target_sigval {
     int sival_int;
     abi_ulong sival_ptr;
 } target_sigval_t;
-#if 0
-#if defined (TARGET_SPARC)
-typedef struct {
-    struct {
-        abi_ulong psr;
-        abi_ulong pc;
-        abi_ulong npc;
-        abi_ulong y;
-        abi_ulong u_regs[16]; /* globals and ins */
-    }               si_regs;
-    int             si_mask;
-} __siginfo_t;
-
-typedef struct {
-    unsigned   long si_float_regs [32];
-    unsigned   long si_fsr;
-    unsigned   long si_fpqdepth;
-    struct {
-        unsigned long *insn_addr;
-        unsigned long insn;
-    } si_fpqueue [16];
-} __siginfo_fpu_t;
-#endif
-#endif
 
 #define TARGET_SI_MAX_SIZE      128