get rid of duplicates, even bsd_signal is questionable

libc/signal/signal.c

@@ -28,8 +28,8 @@ sigset_t _sigintr attribute_hidden;		/* Set by siginterrupt.  */
 
 /* Set the handler for the signal SIG to HANDLER,
    returning the old handler, or SIG_ERR on error.  */
-attribute_hidden __sighandler_t
-__bsd_signal (int sig, __sighandler_t handler)
+__sighandler_t
+bsd_signal (int sig, __sighandler_t handler)
 {
   struct sigaction act, oact;
 
@@ -50,7 +50,6 @@ __bsd_signal (int sig, __sighandler_t handler)
 
   return oact.sa_handler;
 }
-strong_alias(__bsd_signal,bsd_signal)
-strong_alias(__bsd_signal,signal)
+strong_alias(bsd_signal,signal)
 libc_hidden_proto(signal)
 libc_hidden_def(signal)

libc/signal/sysv_signal.c

@@ -36,7 +36,7 @@ libc_hidden_proto(sigaction)
 /* Set the handler for the signal SIG to HANDLER,
    returning the old handler, or SIG_ERR on error.  */
 __sighandler_t
-__sysv_signal (sig, handler)
+sysv_signal (sig, handler)
      int sig;
      __sighandler_t handler;
 {
@@ -59,5 +59,3 @@ __sysv_signal (sig, handler)
 
   return oact.sa_handler;
 }
-
-weak_alias (__sysv_signal, sysv_signal)