Merge #14527: qa: Revert "Make qt wallet test compatible with qt4"

fadffae17f31507a3d79a7b7f1cef71660767e0d Revert "Make qt wallet test compatible with qt4" (MarcoFalke)

Pull request description:

  This removes the file added in #10098

Tree-SHA512: 4aa887ec02aec943f3d74f469c935acf57e43ddbea6f979bb37d3a14670571fa2276cf578e8978de92b5854d8b462f24e5e0addfb27b92fbedf90726eb5d985e

4 files changed, 7 insertions, 43 deletions

diff --git a/src/qt/callback.h b/src/qt/callback.h
deleted file mode 100644
index da6b0c4c2e..0000000000
--- a/src/qt/callback.h
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef BITCOIN_QT_CALLBACK_H
-#define BITCOIN_QT_CALLBACK_H
-
-#include <QObject>
-
-class Callback : public QObject
-{
-    Q_OBJECT
-public Q_SLOTS:
-    virtual void call() = 0;
-};
-
-template <typename F>
-class FunctionCallback : public Callback
-{
-    F f;
-
-public:
-    explicit FunctionCallback(F f_) : f(std::move(f_)) {}
-    ~FunctionCallback() override {}
-    void call() override { f(this); }
-};
-
-template <typename F>
-FunctionCallback<F>* makeCallback(F f)
-{
-    return new FunctionCallback<F>(std::move(f));
-}
-
-#endif // BITCOIN_QT_CALLBACK_H
diff --git a/src/qt/test/addressbooktests.cpp b/src/qt/test/addressbooktests.cpp
index 3525846044..e6777c068d 100644
--- a/src/qt/test/addressbooktests.cpp
+++ b/src/qt/test/addressbooktests.cpp
@@ -6,15 +6,14 @@
 #include <qt/addressbookpage.h>
 #include <qt/addresstablemodel.h>
 #include <qt/editaddressdialog.h>
-#include <qt/callback.h>
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
 #include <qt/qvalidatedlineedit.h>
 #include <qt/walletmodel.h>
 
 #include <key.h>
-#include <pubkey.h>
 #include <key_io.h>
+#include <pubkey.h>
 #include <wallet/wallet.h>
 
 #include <QApplication>
diff --git a/src/qt/test/util.cpp b/src/qt/test/util.cpp
index 0bd719326e..ae2fb93bf7 100644
--- a/src/qt/test/util.cpp
+++ b/src/qt/test/util.cpp
@@ -1,15 +1,13 @@
-#include <qt/callback.h>
-
 #include <QApplication>
 #include <QMessageBox>
-#include <QTimer>
-#include <QString>
 #include <QPushButton>
+#include <QString>
+#include <QTimer>
 #include <QWidget>
 
 void ConfirmMessage(QString* text, int msec)
 {
-    QTimer::singleShot(msec, makeCallback([text](Callback* callback) {
+    QTimer::singleShot(msec, [text]() {
         for (QWidget* widget : QApplication::topLevelWidgets()) {
             if (widget->inherits("QMessageBox")) {
                 QMessageBox* messageBox = qobject_cast<QMessageBox*>(widget);
@@ -17,6 +15,5 @@ void ConfirmMessage(QString* text, int msec)
                 messageBox->defaultButton()->click();
             }
         }
-        delete callback;
-    }), &Callback::call);
+    });
 }
diff --git a/src/qt/test/wallettests.cpp b/src/qt/test/wallettests.cpp
index bbc520bdf1..9ca0e7c67d 100644
--- a/src/qt/test/wallettests.cpp
+++ b/src/qt/test/wallettests.cpp
@@ -3,7 +3,6 @@
 
 #include <interfaces/node.h>
 #include <qt/bitcoinamountfield.h>
-#include <qt/callback.h>
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
 #include <qt/qvalidatedlineedit.h>
@@ -39,7 +38,7 @@ namespace
 //! Press "Yes" or "Cancel" buttons in modal send confirmation dialog.
 void ConfirmSend(QString* text = nullptr, bool cancel = false)
 {
-    QTimer::singleShot(0, makeCallback([text, cancel](Callback* callback) {
+    QTimer::singleShot(0, [text, cancel]() {
         for (QWidget* widget : QApplication::topLevelWidgets()) {
             if (widget->inherits("SendConfirmationDialog")) {
                 SendConfirmationDialog* dialog = qobject_cast<SendConfirmationDialog*>(widget);
@@ -49,8 +48,7 @@ void ConfirmSend(QString* text = nullptr, bool cancel = false)
                 button->click();
             }
         }
-        delete callback;
-    }), &Callback::call);
+    });
 }
 
 //! Send coins to address and return txid.