diff --git a/scrapy/core/downloader/handlers/http11.py b/scrapy/core/downloader/handlers/http11.py
index c970909d7..09f828419 100644
--- a/scrapy/core/downloader/handlers/http11.py
+++ b/scrapy/core/downloader/handlers/http11.py
@@ -341,20 +341,6 @@ class ScrapyAgent:
             headers.removeHeader(b'Proxy-Authorization')
         if request.body:
             bodyproducer = _RequestBodyProducer(request.body)
-        elif method == b'POST':
-            # Setting Content-Length: 0 even for POST requests is not a
-            # MUST per HTTP RFCs, but it's common behavior, and some
-            # servers require this, otherwise returning HTTP 411 Length required
-            #
-            # RFC 7230#section-3.3.2:
-            # "a Content-Length header field is normally sent in a POST
-            # request even when the value is 0 (indicating an empty payload body)."
-            #
-            # Twisted < 17 will not add "Content-Length: 0" by itself;
-            # Twisted >= 17 fixes this;
-            # Using a producer with an empty-string sends `0` as Content-Length
-            # for all versions of Twisted.
-            bodyproducer = _RequestBodyProducer(b'')
         else:
             bodyproducer = None
         start_time = time()