Remove extra subtitle for legal preferences.

Fixes #1894381
diff --git a/res/xml/device_info_settings.xml b/res/xml/device_info_settings.xml
index bb7c531..3804500 100644
--- a/res/xml/device_info_settings.xml
+++ b/res/xml/device_info_settings.xml
@@ -37,9 +37,6 @@
         <PreferenceScreen
                 android:key="container"
                 android:title="@string/legal_information">
-
-            <!-- Title for this other screen -->
-            <PreferenceCategory android:title="@string/legal_information" />
                     
             <!-- Note: The titles given here probably won't be used.  Instead, we programmatically
                        fill the title with the label of the activity with the corresponding action.