Revert "connected: do not sort input revisions"

This reverts commit f45022dc2f,
as this is like breakage in the traversal more likely.  In a
history with 10 single strand of pearls,

   1-->2-->3--...->7-->8-->9-->10

asking "rev-list --unsorted-input 1 10 --not 9 8 7 6 5 4" fails to
paint the bottom 1 uninteresting as the traversal stops, without
completing the propagation of uninteresting bit starting at 4 down
through 3 and 2 to 1.

connected.c

@@ -106,7 +106,6 @@ no_promisor_pack_found:
 	if (opt->progress)
 		strvec_pushf(&rev_list.args, "--progress=%s",
 			     _("Checking connectivity"));
-	strvec_push(&rev_list.args, "--unsorted-input");
 
 	rev_list.git_cmd = 1;
 	rev_list.env = opt->env;