Remove unused structure.
Remove unused structure.

sctplab/usrsctp,weinrank/usrsctp,weinrank/usrsctp,CoolmanCZ/usrsctp,CoolmanCZ/usrsctp,CoolmanCZ/usrsctp,weinrank/usrsctp,CoolmanCZ/usrsctp,sctplab/usrsctp,sctplab/usrsctp