Just put this inside a web scope feature and say goodbye to the top navigation root node...

Elements.xml

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Control
    Sequence="50"
    Id="TopNavigationDataSource"
    ControlClass="Microsoft.SharePoint.Publishing.Navigation.PortalSiteMapDataSourceSwitch"
    ControlAssembly="Microsoft.SharePoint.Publishing, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c">
    <Property Name="ID">topSiteMap</Property>
    <Property Name="SiteMapProvider">GlobalNavigation</Property>
    <Property Name="EnableViewState">false</Property>
    <Property Name="StartFromCurrentNode">true</Property>
    <Property Name="ShowStartingNode">false</Property>
    <Property Name="TreatStartingNodeAsCurrent">true</Property>
    <Property Name="TrimNonCurrentTypes">Heading</Property>
  </Control>
</Elements>

Hi, I'm a little confused, but would really like some help on this. Do I have to create a new feature to do this, or is this something I can add to an existing feature or how does this work. Sorry for the ignorance, but Ive only installed features in the past, never had to modify one.

Thanks