Make sure CFGNode in CFGFast._nodes dict is removed when _remove_node() is called.
Make sure CFGNode in CFGFast._nodes dict is removed when _remove_node() is called.

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