remove cs56 materials
remove cs56 materials

ucsb-cs8-m17/ucsb-cs8-m17.github.io,ucsb-cs8-m17/ucsb-cs8-m17.github.io,ucsb-cs8-m17/ucsb-cs8-m17.github.io,ucsb-cs8-m17/ucsb-cs8-m17.github.io,ucsb-cs8-m17/ucsb-cs8-m17.github.io