burying unused conditionals

__ARCH_WANT_SYS_RT_SIGACTION,
__ARCH_WANT_SYS_RT_SIGSUSPEND,
__ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND,
__ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL - not used anymore
CONFIG_GENERIC_{SIGALTSTACK,COMPAT_RT_SIG{ACTION,QUEUEINFO,PENDING,PROCMASK}} -
can be assumed always set.

include/asm-generic/syscalls.h

@@ -21,13 +21,6 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
 			unsigned long fd, off_t pgoff);
 #endif
 
-#ifndef CONFIG_GENERIC_SIGALTSTACK
-#ifndef sys_sigaltstack
-asmlinkage long sys_sigaltstack(const stack_t __user *, stack_t __user *,
-			struct pt_regs *);
-#endif
-#endif
-
 #ifndef sys_rt_sigreturn
 asmlinkage long sys_rt_sigreturn(struct pt_regs *regs);
 #endif