removing old lab materials page
removing old lab materials page


Former-commit-id: 84f009b5f29d41d6492a25af70296995c1fbf2db [formerly 245346b1975092874bf5c137342cb152c802abb7] [formerly 13d55f21fd8874a211898f0584f95a3d6b85301d]
Former-commit-id: bd09a14f12efb007f244104e205396d8419502d1
Former-commit-id: 4ebe1f301097d019e96d96e587c41975272ed6cb
StanfordHCI/cs247,StanfordHCI/cs247,StanfordHCI/cs247