fix logic that determines whether games are startable when the game is first constructed

server/model/Game.js

@@ -9,8 +9,7 @@ class Game {
         hasDedicatedModerator,
         originalModeratorId,
         createTime,
-        timerParams = null,
-        isTestGame = false
+        timerParams = null
     ) {
         this.accessCode = accessCode;
         this.status = status;
@@ -27,9 +26,6 @@ class Game {
         this.previousModeratorId = null;
         this.createTime = createTime;
         this.timerParams = timerParams;
-        this.isStartable = (this.gameSize === 1 && !this.hasDedicatedModerator)
-            || (this.gameSize === 0 && this.hasDedicatedModerator)
-            || isTestGame;
         this.timeRemaining = null;
     }
 }