Revert "added rule shorthand, for creating CrawlSpider rules"

This reverts commit r863.

This is not the place for this shorthand, and it hasn't the blessing of
BDFL. I look forward for the return of this shorthand.

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%401023

scrapy/trunk/scrapy/contrib/spiders/__init__.py

@@ -1,2 +1,2 @@
-from scrapy.contrib.spiders.crawl import CrawlSpider, Rule, rule
+from scrapy.contrib.spiders.crawl import CrawlSpider, Rule
 from scrapy.contrib.spiders.feed import XMLFeedSpider, CSVFeedSpider

scrapy/trunk/scrapy/contrib/spiders/crawl.py

@@ -10,7 +10,6 @@ import copy
 from scrapy.http import Request
 from scrapy.spider import BaseSpider
 from scrapy.conf import settings
-from scrapy.link.extractors import RegexLinkExtractor
 
 class Rule(object):
     """
@@ -46,14 +45,6 @@ class Rule(object):
         else:
             self.follow = follow
 
-
-def rule(regex, callback=None, exclude=None, follow=None):
-    """Shorthand for creating CrawlSpider rules"""
-    deny = [exclude] if exclude else []
-    link_extractor = RegexLinkExtractor(allow=[regex], deny=deny) 
-    return Rule(link_extractor, callback=callback, follow=follow)
-
-
 class CrawlSpider(BaseSpider):
     """
     Class for spiders that crawl over web pages and extract/parse their links