Remove "Docs" link from mix.exs (aws-beam#39)

Hex.pm already automatically adds an "Online documentation" link.

Author: wojtekmach

mix.exs

@@ -45,7 +45,6 @@ defmodule AWS.Mixfile do
     [maintainers: ["Jamu Kakar"],
      licenses: ["Apache 2.0"],
      links: %{"GitHub" => "https://github.com/aws-beam/aws-elixir",
-              "Docs" => "http://hexdocs.pm/aws/#{@version}/",
               "Changelog" => "https://github.com/aws-beam/aws-elixir/blob/master/CHANGELOG.md"}]
   end
 end