I'm creating a map in QGIS Composer that is the result of two merged layers. The legend (screenshot below) is adding two rows with the titles of the layers. The edit property sheet does not give me an option to remove one of these - the minus symbol is grayed.
I can remove the con07 layer, but the desired layers are children of the Assembly_India layer (next screenshot), so I don't see how I could remove it from the original map.
I'm sure this is a very basic principle of QGIS that I am missing here. How can I remove the "con07" and "Assembly_India" rows from my legend?