Remove debug flag (fix #47)

res/xml-v14/preferences.xml

@@ -33,13 +33,6 @@
         android:summary="@string/settings_provider_summary"
         android:title="@string/settings_provider_title" />
 
-    <CheckBoxPreference
-        android:defaultValue="true"
-        android:enabled="false"
-        android:key="debug"
-        android:summary="@string/settings_debug_summary"
-        android:title="@string/settings_debug_title" />
-
     <SwitchPreference
         android:defaultValue="false"
         android:key="status"