NavigationBar.TitleView does not hide menu icon in UWP.

This is my NavBar title view:

<NavigationPage.TitleView>
        <StackLayout Margin="0" Padding="6,0,6,0" BackgroundColor="Yellow"
                     Orientation="Horizontal">
            <Button VerticalOptions="Center" ImageSource="backArrow_icon.png"
                    HorizontalOptions="Start"
                    HeightRequest="30" MinimumHeightRequest="30"
                    WidthRequest="30" MinimumWidthRequest="30"/>
            <Label VerticalOptions="Center"
                   HorizontalOptions="StartAndExpand"
                   Text="{x:Static resources:AppResources.Share}"/>
            <Button VerticalOptions="Center" ImageSource="Check_Icon.png"
                    HorizontalOptions="Start"
                    HeightRequest="30" MinimumHeightRequest="30"
                    WidthRequest="30" MinimumWidthRequest="30"/>
        </StackLayout>
    </NavigationPage.TitleView>

How do I make the menu icon marked in red, invisible? or get rid of it?