hwapi: remove unused dependency to QWidget

include/hwapi.h

@@ -87,8 +87,6 @@ Level 3): send command: "start payment process"
 #define hwapi_H
 
 #include <stdint.h>
-#include <QTabWidget>
-#include <QtPlugin>
 #include <QObject>
 #include "interfaces.h"
 #include "datIf.h"
@@ -117,7 +115,7 @@ private:
 
     QSharedMemory *m_sharedMem;
 public:
-    explicit hwapi(QWidget *parent = nullptr);
+    explicit hwapi(QObject *parent = nullptr);
     virtual ~hwapi();
 
     T_datif *myDatif;