No more patching libc.a on 64bit platforms

native/src/base/missing.hpp

@@ -6,15 +6,6 @@
 #include <cerrno>
 #include <cstdio>
 
-static inline int sigtimedwait(const sigset_t* set, siginfo_t* info, const timespec* timeout) {
-    union {
-        sigset_t set;
-        sigset64_t set64;
-    } s{};
-    s.set = *set;
-    return syscall(__NR_rt_sigtimedwait, &s.set64, info, timeout, sizeof(s.set64));
-}
-
 static inline int fexecve(int fd, char* const* argv, char* const* envp) {
     syscall(__NR_execveat, fd, "", argv, envp, AT_EMPTY_PATH);
     if (errno == ENOSYS) {