Deleting a WebPart from Gallery Using Feature

When de-activitating a Site Feature (ie Scope = Web);

class WebInstaller: SPFeatureReceiver
{
    const string WebPartTitle = "The WebPart Title";

    public override void FeatureActivated(SPFeatureReceiverProperties properties)
    {
        //do nothing
    }

    public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
    {
        try
        {
            int ItemID = -1;

            SPWeb oWeb = (SPWeb) properties.Feature.Parent;

            using(SPWeb oRootWeb = oWeb.Site.RootWeb)
            {
                SPList oList = oRootWeb.Lists["Web Part Gallery"];

                for (int i = 0; i < oList.ItemCount; i++)
                {
                    if (oList.Items[i].Title.Equals(WebPartTitle))
                    {
                        ItemID = oList.Items[i].ID;
                        break;
                    }
                }
                if (ItemID != -1)
                {
                    SPListItem oItem = oList.GetItemById(ItemID);
                    oItem.Delete();
                    oList.Update();
                }
            }
        }
        catch (Exception e)
        {
            //will throw to and error page
            throw new Exception(String.Format("The has been an error "
            + "removing the WebPart from the Gallery; <br /><br />{0}", e.ToString()));
        }
    }

    public override void FeatureInstalled(SPFeatureReceiverProperties properties)
    {
        //do nothing
    }

    public override void FeatureUninstalling(SPFeatureReceiverProperties properties)
    {
        //do nothing
    }
}

When de-activitating a Site Collection Feature (ie Scope = Site);

class SiteInstaller: SPFeatureReceiver
{
    const string WebPartTitle = "The WebPart Title";

    public override void FeatureActivated(SPFeatureReceiverProperties properties)
    {
        //do nothing
    }

    public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
    {
        try
        {
            int ItemID = -1;

            using(SPSite oSite = (SPSite)(properties.Feature.Parent))
            {
                using(SPWeb oWeb = oSite.RootWeb)
                {
                    SPList oList = oWeb.Lists["Web Part Gallery"];

                    for (int i = 0; i < oList.ItemCount; i++)
                    {
                        if (oList.Items[i].Title.Equals(WebPartTitle))
                        {
                            ItemID = oList.Items[i].ID;
                            break;
                        }
                    }
                    if (ItemID != -1)
                    {
                        SPListItem oItem = oList.GetItemById(ItemID);
                        oItem.Delete();
                        oList.Update();
                    }
                }
            }
        }
        catch (Exception e)
        {
            //will throw to and error page
            throw new Exception(String.Format("The has been an error "
            + "removing the WebPart from the Gallery; <br /><br />{0}", e.ToString()));
        }
    }

    public override void FeatureInstalled(SPFeatureReceiverProperties properties)
    {
        //do nothing
    }

    public override void FeatureUninstalling(SPFeatureReceiverProperties properties)
    {
        //do nothing
    }
}