How to hide a rect

I imported an admob script, works and now i have these things on the screen, how do i hide them

@Anis1808 how do i do it with this code though?

    public void OnGUI()
    {
        GUIStyle style = new GUIStyle();

        Rect rect = new Rect(0, 0, Screen.width, Screen.height);
        style.alignment = TextAnchor.LowerRight;
        style.fontSize = (int)(Screen.height * 0.06);
        style.normal.textColor = new Color(0.0f, 0.0f, 0.5f, 1.0f);
        float fps = 1.0f / this.deltaTime;
        string text = string.Format("{0:0.} fps", fps);
        GUI.Label(rect, text, style);

        // Puts some basic buttons onto the screen.
        GUI.skin.button.fontSize = (int)(0.035f * Screen.width);
        float buttonWidth = 0.35f * Screen.width;
        float buttonHeight = 0.15f * Screen.height;
        float columnOnePosition = 0.1f * Screen.width;
        float columnTwoPosition = 0.55f * Screen.width;

        Rect requestBannerRect = new Rect(
            columnOnePosition,
            0.05f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(requestBannerRect, "Request

Banner"))
{
this.RequestBanner();
}

        Rect destroyBannerRect = new Rect(
            columnOnePosition,
            0.225f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(destroyBannerRect, "Destroy

Banner"))
{
this.bannerView.Destroy();
}

        Rect requestInterstitialRect = new Rect(
            columnOnePosition,
            0.4f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(requestInterstitialRect, "Request

Interstitial"))
{
this.RequestInterstitial();
}

        Rect showInterstitialRect = new Rect(
            columnOnePosition,
            0.575f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(showInterstitialRect, "Show

Interstitial"))
{
this.ShowInterstitial();
}

        Rect destroyInterstitialRect = new Rect(
            columnOnePosition,
            0.75f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(destroyInterstitialRect, "Destroy

Interstitial"))
{
this.interstitial.Destroy();
}

        Rect requestRewardedRect = new Rect(
            columnTwoPosition,
            0.05f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(requestRewardedRect, "Request

Rewarded Ad"))
{
this.CreateAndLoadRewardedAd();
}

        Rect showRewardedRect = new Rect(
            columnTwoPosition,
            0.225f * Screen.height,
            buttonWidth,
            buttonHeight);
        if (GUI.Button(showRewardedRect, "Show

Rewarded Ad"))
{
this.ShowRewardedAd();
}

        Rect textOutputRect = new Rect(
            columnTwoPosition,
            0.925f * Screen.height,
            buttonWidth,
            0.05f * Screen.height);
        GUI.Label(textOutputRect, outputMessage);
    }