Remove leftover QOffscreenSurface from EGLHelper

Amends
2ed5f96 Create EGLImage with eglCreateDRMImageMESA() for exporting dma_buf

Task-number: QTBUG-136257
Change-Id: Ice4f4d58edaa7de6a55b2a621e930393803eb869
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit bcee2db)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 2c15c76)

Author: stampho

src/core/ozone/egl_helper.cpp

@@ -5,9 +5,7 @@
 #include "ozone_util_qt.h"
 #include "web_engine_context.h"
 
-#include <QtCore/qthread.h>
 #include <QtGui/qguiapplication.h>
-#include <QtGui/qoffscreensurface.h>
 #include <QtGui/qopenglcontext.h>
 #include <QtGui/qopenglfunctions.h>
 #include <qpa/qplatformnativeinterface.h>
@@ -94,7 +92,6 @@ EGLHelper *EGLHelper::instance()
 EGLHelper::EGLHelper()
     : m_eglDisplay(qApp->platformNativeInterface()->nativeResourceForIntegration("egldisplay"))
     , m_functions(new EGLHelper::EGLFunctions())
-    , m_offscreenSurface(new QOffscreenSurface())
 {
     const char *extensions = m_functions->eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
     if (!extensions) {
@@ -112,9 +109,6 @@ EGLHelper::EGLHelper()
         return;
     }
 
-    Q_ASSERT(QThread::currentThread() == qApp->thread());
-    m_offscreenSurface->create();
-
     m_isDmaBufSupported = QtWebEngineCore::WebEngineContext::isGbmSupported();
 
     // Check extensions.

src/core/ozone/egl_helper.h

@@ -24,8 +24,6 @@
 
 QT_BEGIN_NAMESPACE
 
-class QOffscreenSurface;
-
 class EGLHelper
 {
 public:
@@ -60,7 +58,6 @@ class EGLHelper
 
     EGLDisplay m_eglDisplay = EGL_NO_DISPLAY;
     QScopedPointer<EGLFunctions> m_functions;
-    QScopedPointer<QOffscreenSurface> m_offscreenSurface;
     bool m_isDmaBufSupported = false;
 };