Do not delete some static stuff on exit

Depending on the order of deletion and other variables, these delete
calls might cause a crash on exit or not. And there's actually no
memory leak, since this is all static stuff that's present for the
lifetime of the application.

In this case, it's better to just quit, than explicitly free all memory.
The bytes are gone with the process, and there isn't stuff that needs
to be written on quit here.