avoid deprecating dont_filter in OffsiteMiddleware

docs/topics/request-response.rst

@@ -144,9 +144,9 @@ Request objects
     :type priority: int
 
     :param dont_filter: indicates that this request should not be filtered by
-       the scheduler. This is used when you want to perform an identical
-       request multiple times, to ignore the duplicates filter. Use it with
-       care, or you will get into crawling loops. Default to ``False``.
+       the scheduler or some middlewares. This is used when you want to perform
+       an identical request multiple times, to ignore the duplicates filter.
+       Use it with care, or you will get into crawling loops. Default to ``False``.
     :type dont_filter: bool
 
     :param errback: a function that will be called if any exception was

docs/topics/spider-middleware.rst

@@ -345,15 +345,11 @@ OffsiteMiddleware
    :attr:`~scrapy.Spider.allowed_domains` attribute, or the
    attribute is empty, the offsite middleware will allow all requests.
 
-   If ``allow_offsite`` is set to ``True`` in :attr:`Request.meta`, then the
-   offsite middleware will allow the request even if its domain is not listed
+   If the request has the :attr:`~scrapy.Request.dont_filter` attribute set to
+   ``True`` or :attr:`Request.meta` has ``allow_offsite`` set to ``True``, then
+   the OffsiteMiddleware will allow the request even if its domain is not listed
    in allowed domains.
 
-   .. caution:: Setting :attr:`~scrapy.Request.dont_filter` to ``True`` also
-                causes the offsite middleware to allow the request. However,
-                this is deprecated. Use ``allow_offsite`` instead in
-                :attr:`Request.meta`.
-
 
 RefererMiddleware
 -----------------

scrapy/spidermiddlewares/offsite.py

@@ -12,7 +12,6 @@
 
 from scrapy import Spider, signals
 from scrapy.crawler import Crawler
-from scrapy.exceptions import ScrapyDeprecationWarning
 from scrapy.http import Request, Response
 from scrapy.statscollectors import StatsCollector
 from scrapy.utils.httpobj import urlparse_cached
@@ -51,15 +50,11 @@ async def process_spider_output_async(
     def _filter(self, request: Any, spider: Spider) -> bool:
         if not isinstance(request, Request):
             return True
-        if request.dont_filter:
-            warnings.warn(
-                "The dont_filter filter flag is deprecated in OffsiteMiddleware. "
-                "Set 'allow_offsite' to True in Request.meta instead.",
-                ScrapyDeprecationWarning,
-                stacklevel=2,
-            )
-            return True
-        if request.meta.get("allow_offsite") or self.should_follow(request, spider):
+        if (
+            request.dont_filter
+            or request.meta.get("allow_offsite")
+            or self.should_follow(request, spider)
+        ):
             return True
         domain = urlparse_cached(request).hostname
         if domain and domain not in self.domains_seen: