remove rss_sections from docs (#2087)

Author: LDReid

userguide/content/en/docs/adding-content/content.md

@@ -619,30 +619,9 @@ You can also use this directory for other files used by your project, including
 
 ## RSS feeds
 
-Hugo will, by default, create an RSS feed for the home page and any section. For the main RSS feed you can control which sections to include by setting a site param in your `hugo.toml`/`hugo.yaml`/`hugo.json`. This is the default configuration:
-
-{{< tabpane >}}
-{{< tab header="Configuration file:" disabled=true />}}
-{{< tab header="hugo.toml" lang="toml" >}}
-[params]
-rss_sections = ["blog"]
-{{< /tab >}}
-{{< tab header="hugo.yaml" lang="yaml" >}}
-params:
-  rss_sections: [blog]
-{{< /tab >}}
-{{< tab header="hugo.json" lang="json" >}}
-{
-  "params": {
-    "rss_sections": [
-      "blog"
-      ]
-  }
-}
-{{< /tab >}}
-{{< /tabpane >}}
-
-To disable all RSS feeds, add the following to your `hugo.toml`/`hugo.yaml`/`hugo.json`:
+Hugo will, by default, create an RSS feed for the home page and any section. 
+To disable all RSS feeds, add the following to your 
+`hugo.toml`/`hugo.yaml`/`hugo.json`:
 
 {{< tabpane >}}
 {{< tab header="Configuration file:" disabled=true />}}