Doc change: merge landing page and header/footer designs.

Change-Id: Ic2f603c0215f8dadac2dfa4b871b22b2f9a027e5
diff --git a/docs/html/auto/index.jd b/docs/html/auto/index.jd
index ca63a54..66ea15a 100644
--- a/docs/html/auto/index.jd
+++ b/docs/html/auto/index.jd
@@ -3,7 +3,7 @@
 fullpage=true
 no_footer_links=true
 page.type=about
-page.image=/auto/images/hero.jpg
+page.image=/images/cards/android-auto_2x.png
 
 @jd:body
 
@@ -12,9 +12,6 @@
 #jd-content>.content-footer.wrap {
   display:none;
 }
-#hero-height {
-  height:calc(100% - 100px);
-}
 .img-logo {
   margin:0 auto;
   display:block;