Step 13: Update documentation for skinning

README.md

@@ -65,10 +65,6 @@ practices that anyone working with the SDK needs to be be aware of and uphold:
     component is a view or a structure, and then a broad functional grouping
     (e.g. 'rooms' here)
 
-  * After creating a new component you must run `yarn reskindex` to regenerate
-    the `component-index.js` for the SDK (used in future for skinning)
-    <!-- TODO: Remove this once this approach to skinning is replaced -->
-
   * The view's CSS file MUST have the same name (e.g. view/rooms/MessageTile.css).
     CSS for matrix-react-sdk currently resides in
     https://github.com/vector-im/element-web/tree/master/src/skins/vector/css/matrix-react-sdk.
@@ -158,9 +154,6 @@ cd matrix-react-sdk
 git checkout develop
 yarn link matrix-js-sdk
 yarn install
-
-# Generate the `component-index.js` file.
-yarn reskindex
 ```
 
 See the [help for `yarn link`](https://classic.yarnpkg.com/docs/cli/link) for