[SPARC]: Kill sys_ioperm decl from unistd.h

include/asm-sparc/unistd.h

@@ -461,7 +461,6 @@ asmlinkage unsigned long sys_mmap2(
 				unsigned long addr, unsigned long len,
 				unsigned long prot, unsigned long flags,
 				unsigned long fd, unsigned long pgoff);
-asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on);
 struct sigaction;
 asmlinkage long sys_rt_sigaction(int sig,
 				const struct sigaction __user *act,