How to remove Xamarin Android App Header ?

Hi everyone !
I want to remove this section on the next screen after splash screen.I using two activity.
1-SplashActivity 2- MainActivity

here is my values -> styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="Theme.Splash" parent="android:Theme">
        <item name="android:windowBackground">@drawable/Splash</item>
    </style>

    <style name="MainTheme" parent="MainTheme.Base"></style>
    <!-- Base theme applied no matter what API -->
    <style name="MainTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
        <!--If you are using revision 22.1 please use just windowNoTitle. Without android:-->
        <item name="android:windowNoTitle">true</item>
        <!--We will be using the toolbar so no need to show ActionBar-->
        <item name="windowActionBar">false</item>
        <!-- Set theme colors from http://www.google.com/design/spec/style/color.html#color-color-palette -->
        <!-- colorPrimary is used for the default action bar background -->
        <item name="colorPrimary">#ED6933</item>
        <!-- colorPrimaryDark is used for the status bar -->
        <item name="colorPrimaryDark">#ED6933</item>
        <!-- colorAccent is used as the default value for colorControlActivated
         which is used to tint widgets -->
        <item name="colorAccent">#FF4081</item>
        <!-- You can also set colorControlNormal, colorControlActivated
         colorControlHighlight and colorSwitchThumbNormal. -->
        <item name="windowActionModeOverlay">false</item>
        <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
    </style>
    <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">
        <item name="colorAccent">#FF4081</item>
    </style>
</resources>