remove calc_speed log

helper/refill/policy/ctl_item.php

@@ -103,7 +103,6 @@ class ctl_item
     public function calc_speed()
     {
         $this->mLazySpeed = $this->cur_speed();
-        Log::record("{$this->mPrefix} calc_speed:{$this->mLazySpeed}",Log::DEBUG);
     }
 
     public function lazy_speed()