billing changes

res/xml/preferences.xml

@@ -10,10 +10,6 @@
 			a:defaultValue="false"
 			/>
 
-	<org.solovyev.android.ads.AdViewPreference
-			a:key="admob_01"
-			a:layout="@layout/admob_pref"/>
-
 	<PreferenceScreen a:title="@string/c_prefs_calculations_category">
 
 		<android.preference.CheckBoxPreference
@@ -143,6 +139,11 @@
 				a:title="@string/c_calc_use_back_button_as_prev_title"
 				a:defaultValue="false"/>
 
+		<Preference
+				a:key="@string/p_clear_billing_info_key"
+				a:summary="@string/c_clear_billing_info_summary"
+				a:title="@string/c_clear_billing_info_title"/>
+
 	</PreferenceScreen>
 
 </PreferenceScreen>