Remove never used backend

src/backend.cpp

@@ -1,16 +0,0 @@
-#include "backend.h"
-
-Backend::Backend(QObject *parent) : QObject(parent)
-{
-
-}
-
-void Backend::getTest()
-{
-    emit setTest();
-}
-
-void Backend::exit()
-{
-    qDebug() << "EXIOTTT";
-}

src/backend.h

@@ -1,21 +0,0 @@
-#ifndef BACKEND_H
-#define BACKEND_H
-
-#include <QObject>
-#include <QDebug>
-
-class Backend : public QObject
-{
-    Q_OBJECT
-public:
-    explicit Backend(QObject *parent = nullptr);
-
-signals:
-    void setTest();
-
-public slots:
-    void getTest();
-    void exit();
-};
-
-#endif // BACKEND_H