templates/about: remove mentions of dependencies

Author: decathorpe

templates/about.hbs

@@ -116,9 +116,7 @@ all-features = true
 no-default-features = true
 default-target = "x86_64-unknown-linux-gnu"
 rustc-args = [ "--example-rustc-arg" ]
-rustdoc-args = [ "--example-rustdoc-arg" ]
-# the dependencies key is currently unused, but is being saved for future support
-dependencies = [ "example-system-dependency" ]</pre></code>
+rustdoc-args = [ "--example-rustdoc-arg" ]</pre></code>
 
   <h4>Version</h4>
   <p>Currently running Docs.rs version is: <strong>{{cratesfyi_version}}</strong>