message: Remove note about 'work in progress' Qt UI in linux README
diff: @@ -2,9 +2,7 @@ About:
  ------
  RenderDoc is a debugger for graphics APIs, currently supporting OpenGL
  -and Vulkan. This package contains the headless utility tool
  -'renderdoccmd' which can be used to capture applications, as well as a
  -work-in-progress version of the Qt UI 'qrenderdoc'.
  +and Vulkan.
  The directory structure in the package matches how it should be
  installed, most commonly under /usr but this is up to you.
  