UTIL: remove unused boost examples

Utilities/BGL/boost/graph/example/Jamfile

Utilities/BGL/boost/graph/example/accum-compile-times.cpp

Utilities/BGL/boost/graph/example/actor_clustering.cpp

Utilities/BGL/boost/graph/example/adj_list_ra_edgelist.cpp

Utilities/BGL/boost/graph/example/adjacency_list.cpp

Utilities/BGL/boost/graph/example/adjacency_list.expected

Utilities/BGL/boost/graph/example/adjacency_list_io.cpp

Utilities/BGL/boost/graph/example/adjacency_matrix.cpp

Utilities/BGL/boost/graph/example/astar-cities.cpp

Utilities/BGL/boost/graph/example/bcsstk01

Utilities/BGL/boost/graph/example/bcsstk01.rsa

Utilities/BGL/boost/graph/example/bellman-example.cpp

Utilities/BGL/boost/graph/example/bellman-ford-internet.cpp

Utilities/BGL/boost/graph/example/bellman_ford.expected

Utilities/BGL/boost/graph/example/bfs-example.cpp

Utilities/BGL/boost/graph/example/bfs-example2.cpp

Utilities/BGL/boost/graph/example/bfs-name-printer.cpp

Utilities/BGL/boost/graph/example/bfs.cpp

Utilities/BGL/boost/graph/example/bfs.expected

Utilities/BGL/boost/graph/example/bfs_basics.expected