remove call to dc_update_device_chats(), this is done by core automatically now

DcCore/DcCore/DC/Wrapper.swift

@@ -394,10 +394,6 @@ public class DcContext {
         return Int(dc_add_device_msg(contextPointer, label.cString(using: .utf8), msg.cptr))
     }
 
-    public func updateDeviceChats() {
-        dc_update_device_chats(contextPointer)
-    }
-
     public func getProviderFromEmail(addr: String) -> DcProvider? {
         guard let dcProviderPointer = dc_provider_new_from_email(contextPointer, addr) else { return nil }
         return DcProvider(dcProviderPointer)

deltachat-ios/Controller/ChatListController.swift

@@ -74,9 +74,6 @@ class ChatListController: UITableViewController {
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
 
-        // 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.
         //let msg = DcMsg(viewType: DC_MSG_TEXT)