network: do not drop requests on carrier lost

On carrier lost, then all requests which require carrier will not be
processed. And they will be processed when the interface gained its
carrier again. So, it is not necessary to drop requests here.

src/network/networkd-link.c

@@ -1522,8 +1522,6 @@ static int link_carrier_lost(Link *link) {
                 return r;
         }
 
-        link_drop_requests(link);
-
         r = link_drop_config(link);
         if (r < 0)
                 return r;