tests: preserve diagnostic filters when wiring peer endpoints

tests/test_net.h

@@ -41,7 +41,6 @@ static inline void test_etcp_set_peer(struct UTUN_INSTANCE* client, const char*
                 abort();
             }
             link->remote_addr = target->interface_addr;
-            debug_set_category_level(DEBUG_CATEGORY_DEBUG, DEBUG_LEVEL_INFO);
             DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "test fixture: client=%s listener=%s peer=%016llx port=%u",
                        client_name, socket_name, (unsigned long long)peer->node_id, ss_get_port(&link->remote_addr));
         }