Hide --proglang for now

Author: wojtekmach

lib/ex_doc/cli.ex

@@ -123,7 +123,6 @@ defmodule ExDoc.CLI do
       -l, --logo          Path to the image logo of the project (only PNG or JPEG accepted)
                           The image size will be 64x64 and copied to the assets directory
       -m, --main          The entry-point page in docs, default: "api-reference"
-          --proglang      The project's programming language, default: "elixir"
           --source-ref    Branch/commit/tag used for source link inference, default: "master"
       -r, --source-root   Path to the source code root, used for generating links, default: "."
       -u, --source-url    URL to the source code