Removed messages about incomplete transaction events

The message is logged when a DDL statement is executed. It should not be
logged if trx_safe is on since the current_safe_event should always point
at the event we are sending. The current_safe_event is set to the wrong value
which causes this message to be logged.

Due to the false positives caused by this, the message is removed.

server/modules/routing/binlog/blr_master.c

@@ -1931,13 +1931,6 @@ blr_distribute_binlog_record(ROUTER_INSTANCE *router, REP_HEADER *hdr, uint8_t *
                       (hdr->event_type == ROTATE_EVENT &&
                        strcmp(slave->binlogfile, router->prevbinlog))))
             {
-                if (router->trx_safe)
-                {
-                    MXS_ERROR("Slave %s:%d, server ID %u: Sending event from an "
-                              "incomplete transaction from file %s@%u.",
-                              slave->dcb->remote, ntohs((slave->dcb->ipv4).sin_port),
-                              slave->serverid, slave->binlogfile, slave->binlog_pos);
-                }
                 /**
                  * Transaction safety is off or there are no pending transactions
                  */