[An extra null pointer check is not needed](https://isocpp.org/wiki/faq/freestore-mgmt#delete-handles-null "Do I need to check for null before delete p?") in [the destructor for the class “PageTableLevel”](https://github.com/memtt/numaprof/blob/f8696a27b7bda13e133965cedfadf1ad64426327/src/lib/core/PageTable.hpp#L213 "Destructor for PageTableLevel").
