gossiper: run: no need to replicate live_endpoints

As asias@scylladb.com noticed, after the previous
patch that calls replicate_live_endpoints_on_change
in mutate_live_and_unreachable_endpoints, _live_endpoints
are always updated on all shards when they change,
so there's no need anymore to replicate them here.

Signed-off-by: Benny Halevy <bhalevy@scylladb.com>

gms/gossiper.cc

@@ -1064,12 +1064,6 @@ void gossiper::run() {
 
                 do_status_check().get();
             }
-
-            {
-                auto lock = lock_endpoint_update_semaphore().get();
-                replicate_live_endpoints_on_change().get();
-            }
-
     }).then_wrapped([this] (auto&& f) {
         try {
             f.get();