Scala list remove duplicates

//id to detect which object was chosen to remain
case class TC(id: Long, value: String) {

  override def equals(obj: Any): Boolean = obj match {
    case tc: TC => value == tc.value
    case _ => false
  }
}

val data = List(TC(1, "1"), TC(2, "1"), TC(3, "2"), TC(4, "1"), TC(5, "2"), TC(6, "2"), TC(7, "3"), TC(8, "3"))

data.groupBy(_.value).map(_._2.last)