add a docstring and remove an obsolete feature
add a docstring and remove an obsolete feature

chubbymaggie/angr,schieb/angr,tyb0807/angr,iamahuman/angr,schieb/angr,chubbymaggie/simuvex,axt/angr,angr/simuvex,f-prettyland/angr,axt/angr,chubbymaggie/angr,chubbymaggie/simuvex,tyb0807/angr,f-prettyland/angr,angr/angr,f-prettyland/angr,axt/angr,iamahuman/angr,angr/angr,tyb0807/angr,schieb/angr,chubbymaggie/simuvex,chubbymaggie/angr,iamahuman/angr,angr/angr