Fix a lot of easy lint issues

Change-Id: I80b43dae137cbbb912ec0fcc4e401de16a9b44a1
diff --git a/res/layout-sw600dp/launcher.xml b/res/layout-sw600dp/launcher.xml
index 94c69a6..69b75be 100644
--- a/res/layout-sw600dp/launcher.xml
+++ b/res/layout-sw600dp/launcher.xml
@@ -15,8 +15,7 @@
 -->
 
 <com.android.launcher2.DragLayer
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher"
+    xmlns:android="http://schemas.android.com/apk/res/android" >
 
     android:id="@+id/drag_layer"
     android:layout_width="match_parent"