Releases all resources allocated to private_key.
You don't have to call this functions for a GStaticPrivate with an
unbounded lifetime, i.e. objects declared 'static', but if you have
a GStaticPrivate as a member of a structure and the structure is
freed, you should also free the GStaticPrivate.
Releases all resources allocated to private_key. You don't have to call this functions for a GStaticPrivate with an unbounded lifetime, i.e. objects declared 'static', but if you have a GStaticPrivate as a member of a structure and the structure is freed, you should also free the GStaticPrivate.