Remove unnecessary resource

Change-Id: I3e7b459a4017645bf8ee32040d93cde1f0c4e31e
diff --git a/res/values-sw600dp-port/constants.xml b/res/values-sw600dp-port/constants.xml
index 6336ae6..44c537d 100644
--- a/res/values-sw600dp-port/constants.xml
+++ b/res/values-sw600dp-port/constants.xml
@@ -15,8 +15,6 @@
      limitations under the License.
 -->
 <resources>
-    <!-- Boolean value indicating whether the table UI should be used. -->
-    <integer name="use_tablet_ui">1</integer>
     <!-- Boolean value indicating whether conversation can be collapsed. -->
     <integer name="conversation_list_collapsible">1</integer>
     <integer name="conversation_header_mode">1</integer>