diff --git a/scrapy/core/downloader/__init__.py b/scrapy/core/downloader/__init__.py
index 4b4d4efc7..76cd376e1 100644
--- a/scrapy/core/downloader/__init__.py
+++ b/scrapy/core/downloader/__init__.py
@@ -95,13 +95,6 @@ def _get_concurrency_delay(
 ) -> tuple[int, float]:
     delay: float = settings.getfloat("DOWNLOAD_DELAY")
     if hasattr(spider, "download_delay"):
-        warnings.warn(
-            "The 'download_delay' spider attribute is deprecated. "
-            "Use Spider.custom_settings or Spider.update_settings() instead. "
-            "The corresponding setting name is 'DOWNLOAD_DELAY'.",
-            category=ScrapyDeprecationWarning,
-            stacklevel=2,
-        )
         delay = spider.download_delay
 
     if hasattr(spider, "max_concurrent_requests"):