Doc: Remove Layouts from Qt Quick Controls index page

Qt Quick Layouts is a module by itself and it is misleading to
list its items here.

Add a note instead to say that Qt Quick Controls can be used with
Qt Quick Layouts.

Change-Id: I0e0a506f5ff7f2702126388fa60ff075ee2cbb4e
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>

src/controls/doc/src/qtquickcontrols-index.qdoc

@@ -36,6 +36,8 @@
 
     The module is new in Qt 5.1 and requires \l{Qt Quick} 2.1.
 
+    \note \l{Qt Quick Layouts} can be used to arrange Qt Quick Controls in a user interface.
+
     \note The current focus is on desktop, but in the long term Qt Quick Controls
     are expected to be supported on mobile platforms too.
 
@@ -59,11 +61,6 @@
     Controls are typically items that are used to present or receive input from the user.
     \annotatedlist controls
 
-    \section1 Layouts
-    \l{Qt Quick Layouts}{Layouts} can be used to have dynamic user interfaces where the UI
-    adapts to the available geometry.
-    \annotatedlist layouts
-
     \section1 Related information
 
     \section2 Guides