[An extra null pointer check is not needed in functions](https://isocpp.org/wiki/faq/freestore-mgmt#delete-handles-null "Do I need to check for null before delete p?") like the following. * [byte_string](https://github.com/ucbrise/confluo/blob/5d813245952b2fbd7b103a1ca70e5869d92d1498/libconfluo/src/types/byte_string.cc#L96 "Destructor for byte_string") * [delta_encoded_array](https://github.com/ucbrise/confluo/blob/7aa7ed5ccba3ecf6d07f160a5dce2880f314c830/libconfluo/confluo/container/bitmap/delta_encoded_array.h#L43 "Destructor for delta_encoded_array") * [string_map](https://github.com/ucbrise/confluo/blob/7aa7ed5ccba3ecf6d07f160a5dce2880f314c830/libconfluo/confluo/container/string_map.h#L89 "Destructor for string_map")
