Remove old workaround

no longer grow the number of games per task,
it is no longer needed for fishtest performance
and limits the number of workers that can be assigned e.g. to a progression test.

server/fishtest/rundb.py

@@ -873,10 +873,7 @@ def worker_cap(self, run, worker_info):
         game_time = estimate_game_duration(run["args"]["tc"])
         concurrency = worker_info["concurrency"] // run["args"]["threads"]
         assert concurrency >= 1
-        # as we have more tasks done (>250), make them longer to avoid
-        # having many tasks in long running tests
-        scale_duration = 1 + min(4, len(run["tasks"]) // 250)
-        games = self.task_duration * scale_duration / game_time * concurrency
+        games = self.task_duration / game_time * concurrency
         if "sprt" in run["args"]:
             batch_size = 2 * run["args"]["sprt"].get("batch_size", 1)
             games = max(batch_size, batch_size * int(games / batch_size + 1 / 2))