Revert "docs: Add Videos section to N Preview landing page"

Reverting this change since I don't have confirmation that the videos will ship by 10am on 6/15.

This reverts commit a1f02ff4e439d9de58ed4a788a52c2f73cfc36ce.

Change-Id: I854c589436bcc4e146770415898996826f552b21
diff --git a/docs/html/preview/index.jd b/docs/html/preview/index.jd
index 0b21e68..918de48 100644
--- a/docs/html/preview/index.jd
+++ b/docs/html/preview/index.jd
@@ -114,24 +114,7 @@
     data-initial-results="3"></div>
 </div></section>
 
-
-<section class="dac-section dac-gray" id="videos"><div class="wrap">
-  <h1 class="dac-section-title">Videos</h1>
-  <div class="dac-section-subtitle">
-    New Android capabilities and the right way to use them in your apps.
-  </div>
-
-  <div class="resource-widget resource-flow-layout col-16"
-    data-query="collection:preview/landing/videos/first,type:youtube+tag:androidn"
-    data-sortOrder="-timestamp"
-    data-cardSizes="6x6"
-    data-items-per-page="6"
-    data-maxResults="15"
-    data-initial-results="3"></div>
-</div></section>
-
-
-<section class="dac-section dac-light" id="resources"><div class="wrap">
+<section class="dac-section dac-gray"><div class="wrap">
   <h1 class="dac-section-title">Resources</h1>
   <div class="dac-section-subtitle">
     Essential information to help you get your apps ready for Android N.