fixed bug where coros.semaphore passed limit arg to BoundedSemaphore,

which doesn't support it.  This would have raised a TypeError because
of the extra arg if ever called.

eventlet/coros.py

@@ -47,7 +47,7 @@ def semaphore(count=0, limit=None):
     if limit is None:
         return Semaphore(count)
     else:
-        return BoundedSemaphore(count, limit)
+        return BoundedSemaphore(count)
 
 
 class metaphore(object):