Use real delays (oops!)

That's a leftover from debugging. I think that's what was causing
Releasable to leak memory (reaching 1.5G at times). There's still no
good reason for leaking like that (even if it was doing something so
frequently), but we can count that as my fault.

bin/Releasable.p6

@@ -249,7 +249,7 @@ sub remind($msg, @channels) {
 multi method keep-reminding($msg) {
     # TODO multi-server setup not supported (this will be irrelevant after #284)
     loop {
-        my &bail = { sleep $CONFIG<releasable><spam-exception-delay> ÷ 100000; next }
+        my &bail = { sleep $CONFIG<releasable><spam-exception-delay>; next }
         my $datetime = parse-next-release $msg;
         bail without $datetime;
         my $diff = $datetime - DateTime.now;
@@ -258,7 +258,7 @@ multi method keep-reminding($msg) {
         my $every = $CONFIG<releasable><spam-every>;
         bail if $diff < $every; # too close to the release
         my $left = $diff % $every;
-        sleep 15;#$left;
+        sleep $left;
         remind $msg, $CONFIG<releasable><spammed-channels>
     }
     CATCH { default { self.handle-exception: $_, $msg } }