removed deprecated stat 'envinfo/request_depth_limit'. we should instead support dumping settings, for these cases

scrapy/contrib/spidermiddleware/depth.py

@@ -13,8 +13,6 @@ class DepthMiddleware(object):
         self.maxdepth = maxdepth
         self.stats = stats
         self.verbose_stats = verbose_stats
-        if self.stats and self.maxdepth:
-            stats.set_value('envinfo/request_depth_limit', maxdepth)
 
     @classmethod
     def from_settings(cls, settings):

scrapy/tests/test_spidermiddleware_depth.py

@@ -15,7 +15,6 @@ class TestDepthMiddleware(TestCase):
         self.stats.open_spider(self.spider)
 
         self.mw = DepthMiddleware(1, self.stats, True)
-        self.assertEquals(self.stats.get_value('envinfo/request_depth_limit'), 1)
 
     def test_process_spider_output(self):
         req = Request('http://scrapytest.org')