Move sig_to_num and num_to_sig into portability.c.

macOS doesn't have real-time signals, and it has a slightly different
set of non-portable signals from Linux.

With this, the toybox `kill -l` output matches the default macOS kill(1).

1 files changed, 0 insertions, 2 deletions

diff --git a/lib/lib.h b/lib/lib.h
index 7f79bdb8..c3b3671c 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -388,9 +388,7 @@ struct mtab_list *xgetmountlist(char *path);
 void generic_signal(int signal);
 void exit_signal(int signal);
 void sigatexit(void *handler);
-int sig_to_num(char *pidstr);
 void list_signals();
-char *num_to_sig(int sig);
 
 mode_t string_to_mode(char *mode_str, mode_t base);
 void mode_to_string(mode_t mode, char *buf);