Hey Guys 
I have a raster of 0 and 1, I want to delete row 0 and I thought I could simply go in to the Atrribute table to delete it but "delete Selected" is greyed out. I gather that its not possible to do it this way so how would I go about it?

Im a total noob but Im loving ArcGIS and my site selection project is almost finished 
thanks in advance !