docs: N Preview 1 - Samples page

- updated listing per input from Android DPE team

b/27486553

Change-Id: Id74c029c27ac15fa49b27d9872baaa88e137c70a
diff --git a/docs/html/preview/samples.jd b/docs/html/preview/samples.jd
index eab0908..1222095 100644
--- a/docs/html/preview/samples.jd
+++ b/docs/html/preview/samples.jd
@@ -21,7 +21,7 @@
   user interfaces with your app.
 </p>
 <p>
-  <a href="https://github.com/googlesamples/android-MultiwindowPlayground">
+  <a href="https://github.com/googlesamples/android-MultiWindowPlayground">
   Get it on GitHub</a>
 </p>
 
@@ -69,14 +69,3 @@
   <a href="https://github.com/googlesamples/android-ScopedDirectoryAccess">
   Get it on GitHub</a>
 </p>
-
-
-<h3 id="AutomaticBackup">Drag and Drop</h3>
-<p>
-  This sample demonstrates how to use drag and drop user interface feature
-  between windows, when using a multi-window view.
-</p>
-<p>
-  <a href="https://github.com/googlesamples/android-DragAndDrop">
-  Get it on GitHub</a>
-</p>