Drop support for ScrapyCommand.crawler property

scrapy/command.py

@@ -2,12 +2,11 @@
 Base class for Scrapy commands
 """
 import os
-import warnings
 from optparse import OptionGroup
 from twisted.python import failure
 
 from scrapy.utils.conf import arglist_to_dict
-from scrapy.exceptions import UsageError, ScrapyDeprecationWarning
+from scrapy.exceptions import UsageError
 
 
 class ScrapyCommand(object):
@@ -27,31 +26,6 @@ class ScrapyCommand(object):
         assert not hasattr(self, '_crawler'), "crawler already set"
         self._crawler = crawler
 
-    @property
-    def crawler(self):
-        warnings.warn("Command's default `crawler` is deprecated and will be removed. "
-            "Use `create_crawler` method to instatiate crawlers.",
-            ScrapyDeprecationWarning)
-
-        if not hasattr(self, '_crawler'):
-            crawler = self.crawler_process.create_crawler()
-
-            old_start = crawler.start
-            self.crawler_process.started = False
-
-            def wrapped_start():
-                if self.crawler_process.started:
-                    old_start()
-                else:
-                    self.crawler_process.started = True
-                    self.crawler_process.start()
-
-            crawler.start = wrapped_start
-
-            self.set_crawler(crawler)
-
-        return self._crawler
-
     def syntax(self):
         """
         Command syntax (preferably one-line). Do not include command name.