Remove sliding explanation

Change-Id: Iae35385a3fadd7acc8a67b6a8f9beda9cab96cc9
diff --git a/java/res/xml/prefs.xml b/java/res/xml/prefs.xml
index 5252c04..734c6dc 100644
--- a/java/res/xml/prefs.xml
+++ b/java/res/xml/prefs.xml
@@ -20,8 +20,7 @@
     android:key="english_ime_settings">
     <PreferenceScreen
         android:key="subtype_settings"
-        android:title="@string/language_selection_title"
-        android:summary="@string/language_selection_summary" />
+        android:title="@string/language_selection_title" />
     <PreferenceCategory
         android:title="@string/general_category"
         android:key="general_settings">