[commands] Remove window reassignment when tokens reach 0

Author: Rapptz

discord/ext/commands/cooldowns.py

@@ -115,11 +115,6 @@ def update_rate_limit(self, current=None):
         # we're not so decrement our tokens
         self._tokens -= 1
 
-        # see if we got rate limited due to this token change, and if
-        # so update the window to point to our current time frame
-        if self._tokens == 0:
-            self._window = current
-
     def reset(self):
         self._tokens = self.rate
         self._last = 0.0