removed obsolete (and broken) downloader method: is_idle()

scrapy/core/downloader/__init__.py

@@ -176,9 +176,6 @@ class Downloader(object):
 
         return dfd.addBoth(finish_transferring)
 
-    def is_idle(self):
-        return not self.slots
-
     def close(self):
         self._slot_gc_loop.stop()
         for slot in self.slots.itervalues():

scrapy/utils/engine.py

@@ -7,7 +7,6 @@ def get_engine_status(engine):
     global_tests = [
         "time()-engine.start_time",
         "engine.has_capacity()",
-        "engine.downloader.is_idle()",
         "len(engine.downloader.slots)",
         "len(engine.downloader.active)",
         "engine.scraper.is_idle()",