title: Scrapy disable retry middleware
body: <p>I commented the line in settings.py but it continues being enabled.</p>
  
  <pre><code>DOWNLOADER_MIDDLEWARES = {  
         #'scrapy.downloadermiddlewares.retry.RetryMiddleware': 90,
         'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware': 110,
      }
  </code></pre>
  
  <p>At the start of the program it loads a lot of middlewares I didn't enable</p>
  
  <pre><code>2019-08-09 10:43:37 [scrapy.middleware] INFO: Enabled downloader middlewares:
  ['scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
   'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
   'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
   'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
   'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
   'scrapy.downloadermiddlewares.retry.RetryMiddleware',
   'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
   'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
   'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
   'scrapy.downloadermiddlewares.stats.DownloaderStats']
  </code></pre>
  
  <p>Am I missing something? Is there a way to disable it?</p>