Remove updateDeviceChats (see https://github.com/deltachat/deltachat-core-rust/pull/1957)

src/com/b44t/messenger/DcContext.java

@@ -167,7 +167,6 @@ public class DcContext {
     public native int          sendVideochatInvitation(int chat_id);
     public native int          addDeviceMsg         (String label, DcMsg msg);
     public native boolean      wasDeviceMsgEverAdded(String label);
-    public native void         updateDeviceChats    ();
     public @NonNull DcLot      checkQr              (String qr) { return new DcLot(checkQrCPtr(qr)); }
     public native String       getSecurejoinQr      (int chat_id);
     public native int          joinSecurejoin       (String qr);

src/org/thoughtcrime/securesms/ConversationListActivity.java

@@ -85,11 +85,6 @@ public class ConversationListActivity extends PassphraseRequiredActionBarActivit
 
   @Override
   protected void onCreate(Bundle icicle, boolean ready) {
-    ApplicationDcContext dcContext = DcHelper.getContext(this);
-
-    // add welcome message
-//    dcContext.updateDeviceChats();
-
     // update messages - for new messages, do not reuse or modify strings but create new ones.
     // it is not needed to keep all past update messages, however, when deleted, also the strings should be deleted.
     //DcMsg msg = new DcMsg(dcContext, DcMsg.DC_MSG_TEXT);