Revert "Fix compile issue in https://bugs.kde.org/show_bug.cgi?id=440372"

plasma/kwin!1220

This reverts commit 44ad9437 because it
breaks build:
platforms/x11/common/eglonxbackend.cpp:224:66: error: cannot initialize a parameter of type 'EGLNativeWindowType' (aka 'unsigned long') with an rvalue of type 'xcb_window_t *' (aka 'unsigned int *')
        surface = eglCreateWindowSurface(eglDisplay(), config(), &window, nullptr);
                                                                 ^~~~~~~