Change redundant QApplication to QCoreApplication

Author: MinyazevR

tests/PythonQtTestMain.cpp

@@ -43,11 +43,11 @@
 #include "PythonQtTests.h"
 #include "PythonQtTestCleanup.h"
 
-#include <QApplication>
+#include <QCoreApplication>
 
 int main(int argc, char *argv[])
 {
-  QApplication qapp(argc, argv);
+  QCoreApplication qapp(argc, argv);
 
   if (QProcessEnvironment::systemEnvironment().contains("PYTHONQT_RUN_ONLY_MEMORY_TESTS")) {
     PythonQtMemoryTests test;

tests/tests.pro

@@ -19,8 +19,6 @@ DEFINES += QT_NO_CAST_TO_ASCII
 
 gcc: QMAKE_CXXFLAGS += -pedantic -Winit-self -Wuninitialized
 
-QT += widgets
-
 include ( ../build/common.prf )
 include ( ../build/PythonQt.prf )
 include ( ../build/PythonQt_QtAll.prf )