removed vestigal code, and fixed an allocation bug in bgq

src/plugins/select/bluegene/ba/block_allocator.c

src/plugins/select/bluegene/ba_bgq/block_allocator.c

src/plugins/select/bluegene/ba_common.c

src/plugins/select/bluegene/bl/bridge_linker.c

src/plugins/select/bluegene/bl/bridge_status.c

src/plugins/select/bluegene/bl_bgq/bridge_status.cc

src/plugins/select/bluegene/bridge_linker.h