message: Remove outdated info about custom skins
  It has been marked outdated for several years. Since it appears on the repo home
  page, it makes the project feel unmaintained.
diff: @@ -127,61 +127,3 @@ Github Issues
  All issues should be filed under https://github.com/vector-im/riot-web/issues
  for now.
  -
  -OUTDATED: To Create Your Own Skin
  -=================================
  -
  -**This is ALL LIES currently, and needs to be updated**
  -
  -Skins are modules are exported from such a package in the `lib` directory.
  -`lib/skins` contains one directory per-skin, named after the skin, and the
  -`modules` directory contains modules as their javascript files.
  -
  -A basic skin is provided in the matrix-react-skin package. This also contains
  -a minimal application that instantiates the basic skin making a working matrix
  -client.
  -
  -You can use matrix-react-sdk directly, but to do this you would have to provide
  -'views' for each UI component. To get started quickly, use matrix-react-skin.
  -
  -To actually change the look of a skin, you can create a base skin (which
  -does not use views from any other skin) or you can make a derived skin.
  -Note that derived skins are currently experimental: for example, the CSS
  -from the skins it is based on will not be automatically included.
  -
  -To make a skin, create React classes for any custom components you wish to add
  -in a skin within `src/skins/<skin name>`. These can be based off the files in
  -`views` in the `matrix-react-skin` package, modifying the require() statement
  -appropriately.
  -
  -If you make a derived skin, you only need copy the files you wish to customise.
  -
  -Once you've made all your view files, you need to make a `skinfo.json`. This
  -contains all the metadata for a skin. This is a JSON file with, currently, a
  -single key, 'baseSkin'. Set this to the empty string if your skin is a base skin,
  -or for a derived skin, set it to the path of your base skin's skinfo.json file, as
  -you would use in a require call.
  -
  -Now you have the basis of a skin, you need to generate a skindex.json file. The
  -`reskindex.js` tool in matrix-react-sdk does this for you. It is suggested that
  -you add an npm script to run this, as in matrix-react-skin.
  -
  -For more specific detail on any of these steps, look at matrix-react-skin.
  -
  -Alternative instructions:
  -
  - * Create a new NPM project. Be sure to directly depend on react, (otherwise
  - you can end up with two copies of react).
  - * Create an index.js file that sets up react. Add require statements for
  - React and matrix-react-sdk. Load a skin using the 'loadSkin' method on the
  - SDK and call Render. This can be a skin provided by a separate package or
  - a skin in the same package.
  - * Add a way to build your project: we suggest copying the scripts block
  - from matrix-react-skin (which uses babel and webpack). You could use
  - different tools but remember that at least the skins and modules of
  - your project should end up in plain (ie. non ES6, non JSX) javascript in
  - the lib directory at the end of the build process, as well as any
  - packaging that you might do.
  - * Create an index.html file pulling in your compiled javascript and the
  - CSS bundle from the skin you use. For now, you'll also need to manually
  - import CSS from any skins that your skin inherts from.
  