Revert "Make QWidget::activateWindow() NET window manager aware."

This reverts commit 6390248b11b3596d8c946c232e9b0d832dc42941,
which caused the following regressions:

  TESTFUNCTION_FAIL qshortcut::ambiguousItems (pulse_linux-g++)
  TESTFUNCTION_FAIL qshortcut::ambiguousRotation (pulse_linux-g++)
  TESTFUNCTION_FAIL qshortcut::disabledItems (pulse_linux-g++)
  TESTFUNCTION_FAIL qshortcut::keypressConsumption (pulse_linux-g++)
  TESTFUNCTION_FAIL qshortcut::number (pulse_linux-g++)
  TESTFUNCTION_FAIL qshortcut::text (pulse_linux-g++)
  TESTFUNCTION_FAIL qshortcut::unicodeCompare (pulse_linux-g++)

1 files changed, 1 insertions, 21 deletions

diff --git a/src/gui/kernel/qwidget_x11.cpp b/src/gui/kernel/qwidget_x11.cpp
index c1363d2..2266379 100644
--- a/src/gui/kernel/qwidget_x11.cpp
+++ b/src/gui/kernel/qwidget_x11.cpp
@@ -1641,27 +1641,7 @@ void QWidget::activateWindow()
         if (X11->userTime == 0)
             X11->userTime = X11->time;
         qt_net_update_user_time(tlw, X11->userTime);
-
-        if (X11->isSupportedByWM(ATOM(_NET_ACTIVE_WINDOW))) {
-            XEvent e;
-            e.xclient.type = ClientMessage;
-            e.xclient.message_type = ATOM(_NET_ACTIVE_WINDOW);
-            e.xclient.display = X11->display;
-            e.xclient.window = tlw->internalWinId();
-            e.xclient.format = 32;
-            e.xclient.data.l[0] = 1;     // 1 == application
-            e.xclient.data.l[1] = X11->userTime;
-            if (QWidget *aw = QApplication::activeWindow())
-                e.xclient.data.l[2] = aw->internalWinId();
-            else
-                e.xclient.data.l[2] = XNone;
-            e.xclient.data.l[3] = 0;
-            e.xclient.data.l[4] = 0;
-            XSendEvent(X11->display, RootWindow(X11->display, tlw->x11Info().screen()),
-                       false, SubstructureNotifyMask | SubstructureRedirectMask, &e);
-        } else {
-            XSetInputFocus(X11->display, tlw->internalWinId(), XRevertToParent, X11->time);
-        }
+        XSetInputFocus(X11->display, tlw->internalWinId(), XRevertToParent, X11->time);
     }
 }