PhraseList and phrase_editor.xml: unused string removed.

app/src/main/AndroidManifest.xml

@@ -285,7 +285,6 @@
             />
         <activity
             android:name="com.xabber.android.ui.preferences.PhraseList"
-            android:label="@string/events_phrases_title"
             android:parentActivityName="com.xabber.android.ui.preferences.NotificationsSettings">
             <!-- Parent activity meta-data to support 4.0 and lower -->
             <meta-data

app/src/main/res/values/phrase_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="events_phrases_title">Key phrases</string>
     <string name="phrase_add">Add phrase</string>
     <string name="phrase_delete">Delete phrase</string>
     <string name="phrase_delete_confirm">Do you really want to delete phrase: %s?</string>