Hello Yelena,
If you work with the Global Forest Change accuracy version I really recommend you to add it to the CSV data!
You can easily add this data using this Google Earth Engine Playground URL :
https://ee-api.appspot.com/5c0ab918f5eec0ccfa2fbdd49570990c
Just upload your plot file as a Fusion table, make it public and change the reference in the GEE script using the new Fusion table ID.
If you have this data already in the plot location files you will be able to use it in Saiku to make easy analysis on the data collected ( as an extra to other analysis you might be doing in R or whatever)
If you really don't want to add this data you will have to remove the reference to this "extra columns" in the KML template file located in the CEP (which can be uncompressed as a ZIP) ( called **kml_template.fmt** ). Remove the extra Data tags :
<Data name="region"> <value>${placemark.extraInfo[0]}</value> </Data>
<Data name="country"> <value>${placemark.extraInfo[1]}</value> </Data>
<Data name="gfc_tree_cover"> <value>${placemark.extraInfo[2]}</value>
</Data> <Data name="gfc_gain"> <value>${placemark.extraInfo[3]}</value>
<Data> <Data name="gfc_loss"> <value>${placemark.extraInfo[4]}</value> </Data>
<Data name="gfc_forest_loss_year"> <value>${placemark.extraInfo[5]}</value> </Data>
<Data name="gfc_data_mask"> <value>${placemark.extraInfo[6]}</value> </Data>
So remove the Data tags for which you don't have data ( including the region a country if you don't have those columns either!
Hope this was a clear explanation!