message: docs: remove outdated roadmap
diff: - [Getting Started with Universal](#getting-started)
  - [Packages](#packages)
  - [Universal "Gotchas"](#universal-gotchas)
  -- [Roadmap](#roadmap)
  - [Preboot](#preboot)
  - [What's in a name?](#whats-in-a-name)
  - [Universal Team](#universal-team)
  @@ -46,30 +45,6 @@ The packages from this repo are published as scoped packages under [@nguniversal
  Moved to [/docs/gotchas.md](/docs/gotchas.md)
  -# Roadmap
  -
  -## Completed
  -
  -- Integrate the platform API into core
  -- Support Title and Meta services on the server
  -- Develop Express, ASP.NET Core, Hapi engines
  -- Angular CLI support for Universal
  -- Provide a DOM implementation on the server
  -- Hooks in `renderModule*` to do stuff just before rendering to string
  -- Generic state transfer API in the platform
  -- Http Transfer State Module that uses HTTP interceptors and state transfer API
  -- Material 2 works on Universal
  -- Write documentation for core API
  -- Support [AppShell](https://developers.google.com/web/updates/2015/11/app-shell) use cases
  -- Development server/watch mode builder with livereload for CLI
  -
  -## Planning
  -
  -- Full client rehydration strategy that reuses DOM elements/CSS rendered on the server
  -- Better internal performance and stress tests
  -- Make it easier to write unit tests for Universal components
  -- Node.js bridge protocol to communicate with different language backends - Django, Go, PHP etc.
  -
  # Preboot
  Control server-rendered page and transfer state before client-side web app loads to the client-side-app. [Repo](https://github.com/angular/preboot)
  