strings: cleanup

Change-Id: I0c0e0c8fe99c0db04e38d14f1a1f39ef66b65a0b

ring-android/app/src/main/res/values/strings.xml

@@ -126,11 +126,8 @@ along with this program; if not, write to the Free Software
     <string name="notif_dismiss">Dismiss</string>
     <string name="notif_reply">Reply</string>
     <string name="notif_incoming_file_transfer_title">Incoming file from %1$s</string>
-    <string name="notif_incoming_file_transfer">Someone wants to send you a file</string>
     <string name="notif_outgoing_file_transfer_title">Sending file to %1$s</string>
-    <string name="notif_outgoing_file_transfer">Someone wants to send you a file</string>
     <string name="notif_incoming_picture">Picture from %1$s</string>
-    <string name="action_open">Open</string>
     <string name="notif_sync_title">Syncing data…</string>
     <string name="notif_location_title">Sharing location with %1$s</string>
     <string name="location_share_contact">%1$s is sharing location with you</string>