Drop unused named return on moveMonster (nonamedreturns)

game/chase.go

@@ -38,9 +38,9 @@ func (g *RogueGame) runners(int) {
 }
 
 // moveMonster executes a single turn of running for a monster (chase.c
-// move_monst). removed reports that the monster died or left the level
-// (the C -1 return).
-func (g *RogueGame) moveMonster(tp *Monster) (removed bool) {
+// move_monst). The result reports that the monster died or left the
+// level (the C -1 return).
+func (g *RogueGame) moveMonster(tp *Monster) bool {
 	if !tp.On(Slowed) || tp.Turn {
 		if g.chaseStep(tp) {
 			return true