Remove deprecated typedef u32.

include/assoc.h

include/box/box.h

include/fiber.h

include/log_io.h

include/recovery.h

include/tarantool/util.h

include/tbuf.h

src/box/bitset_index.cc

src/box/bitset_index.h

src/box/box.cc

src/box/box_lua.cc

src/box/box_lua_space.cc

src/box/hash_index.cc

src/box/hash_index.h

src/box/index.h

src/box/port.cc

src/box/port.h

src/box/request.cc

src/box/request.h

src/box/space.cc