diff --git a/scrapy/crawler.py b/scrapy/crawler.py
index 41716852c..52d4069ac 100644
--- a/scrapy/crawler.py
+++ b/scrapy/crawler.py
@@ -12,7 +12,6 @@ from scrapy.exceptions import ScrapyDeprecationWarning
 from scrapy.utils.ossignal import install_shutdown_handlers, signal_names
 from scrapy.utils.misc import load_object
 from scrapy import log, signals
-from pdb import set_trace
 
 
 class Crawler(object):