fix(11): comment out unused tactic examples that were not compiling
fix(11): comment out unused tactic examples that were not compiling

cjmazey/fork_leanprover_tutorial,fpvandoorn/tutorial,leanprover/tutorial,leanprover/tutorial,fpvandoorn/tutorial,avigad/tutorial,cjmazey/fork_leanprover_tutorial,soonhokong/lean-tutorial,Hodapp87/cs6460_project,soonhokong/lean-tutorial,avigad/tutorial,cjmazey/fork_leanprover_tutorial,leanprover/tutorial,soonhokong/lean-tutorial,Hodapp87/cs6460_project,avigad/tutorial,fpvandoorn/tutorial,Hodapp87/cs6460_project