parisc: Drop parisc-specific NSIGTRAP define

NIGTRAP is already defined in asm-generic/siginfo.h, so no need to
define it ourselves.
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/include/uapi/asm/siginfo.h

@@ -7,7 +7,4 @@
 
 #include <asm-generic/siginfo.h>
 
-#undef NSIGTRAP
-#define NSIGTRAP	4
-
 #endif