remove 'share' from primary webxdc menu

it is not an action that is useful during usage (as 'add to widget'),
and if, 'forward' should also be there.
instead, just point to 'show in chat'
where meanwhile both are available (which was not always the case)

deltachat-ios/Controller/WebxdcViewController.swift

@@ -451,9 +451,6 @@ class WebxdcViewController: WebViewViewController {
                     appDelegate.appCoordinator.showChat(chatId: message.chatId, msgId: message.id, animated: true, clearViewControllerStack: true)
                 }
             })
-            actions.append(UIAction(title: String.localized("menu_share"), image: UIImage(systemName: "square.and.arrow.up")) { [weak self] _ in
-                self?.shareWebxdc()
-            })
             if sourceCodeUrl != nil {
                 actions.append(UIMenu(options: [.displayInline],
                     children: [
@@ -486,10 +483,6 @@ class WebxdcViewController: WebViewViewController {
             UIApplication.shared.open(url)
         }
     }
-
-    private func shareWebxdc() {
-        Utils.share(message: dcContext.getMessage(id: messageId), parentViewController: self, sourceItem: navigationItem.rightBarButtonItem)
-    }
 }
 
 extension WebxdcViewController: WKScriptMessageHandler {