rpki-client: drop some dead code

[Theo Buehler]

I first wanted to change the %i to a %d, then I noticed that timeout < 1
can't be true since timeout != 0 and 0 <= timeout <= 24*60*60.

Index: main.c
===================================================================
RCS file: /cvs/src/usr.sbin/rpki-client/main.c,v
retrieving revision 1.196
diff -u -p -U5 -r1.196 main.c
--- main.c      19 Apr 2022 13:52:24 -0000      1.196
+++ main.c      19 Apr 2022 19:59:50 -0000
@@ -788,12 +788,10 @@ main(int argc, char *argv[])
                        timeout = strtonum(optarg, 0, 24*60*60, &errs);
                        if (errs)
                                errx(1, "-s: %s", errs);
                        if (timeout == 0)
                                repo_timeout = 24*60*60;
-                       else if (timeout < 1)
-                               errx(1, "-s: %i too small", timeout);
                        else
                                repo_timeout = timeout / 4;
                        break;
                case 't':
                        if (talsz >= TALSZ_MAX)