util/oslib-win32: Remove obsolete reference to g_poll code

The comment about g_poll is not required here anymore since
the corresponding code has been removed a while ago already.

Fixes: b4c6036 ("configure: bump min required glib version to 2.56")
Message-Id: <20221208133257.95673-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

util/oslib-win32.c

@@ -24,10 +24,6 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
- *
- * The implementation of g_poll (functions poll_rest, g_poll) at the end of
- * this file are based on code from GNOME glib-2 and use a different license,
- * see the license comment there.
  */
 
 #include "qemu/osdep.h"