Remove use of private style

- This style is no longer used in the NonPhoneActivity, so
remove it since it's a private style anyways

Change-Id: I691a0bb8f090f5555956457407ab83537ec8b6ac
diff --git a/res/values/styles.xml b/res/values/styles.xml
index d57cb10..5ade9f6 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -255,9 +255,6 @@
     <style name="NonPhoneActivityTheme" parent="@android:Theme.Translucent">
     </style>
 
-    <style name="NonPhoneDialogTheme" parent="@android:Theme.Dialog">
-    </style>
-
     <style name="SectionDivider">
         <item name="android:background">#7e7e87</item>
         <item name="android:layout_height">2dip</item>