diff --git a/scrapy/crawler.py b/scrapy/crawler.py
index c5351c08f..5658e264b 100644
--- a/scrapy/crawler.py
+++ b/scrapy/crawler.py
@@ -11,7 +11,6 @@ from scrapy.core.engine import ExecutionEngine
 from scrapy.exceptions import ScrapyDeprecationWarning
 from scrapy.extension import ExtensionManager
 from scrapy.interfaces import ISpiderLoader
-from scrapy.resolver import CachingHostnameResolver
 from scrapy.settings import overridden_settings, Settings
 from scrapy.signalmanager import SignalManager
 from scrapy.utils.asyncio import install_asyncio_reactor, is_asyncio_reactor_installed