GLScope and GLSpectrum: removed useless calls to cleanup() in destructor

sdrgui/gui/glscope.cpp

@@ -90,7 +90,6 @@ GLScope::GLScope(QWidget *parent) : QGLWidget(parent),
 
 GLScope::~GLScope()
 {
-    cleanup();
 }
 
 void GLScope::setDisplayGridIntensity(int intensity)

sdrgui/gui/glspectrum.cpp

@@ -164,8 +164,6 @@ GLSpectrum::GLSpectrum(QWidget* parent) :
 
 GLSpectrum::~GLSpectrum()
 {
-	cleanup();
-
 	QMutexLocker mutexLocker(&m_mutex);
 
 	if (m_waterfallBuffer)