Show goal time in Race scoreboard w/o "is beaten"

Fixes #2320 (closed).

In the scoreboard in Race, the goal time showed as “12:34.56 is beaten”, which was confusing because it sounded like this is the time that someone has actually beaten. But this is wrong, this time stands for the time players have to beat.

This PR removes the “is beaten”. The goal time in the scoreboard will simply show up as “12:34.56”.