destroy-schema-hook in multi-garnet

[some-mthfka]

Hi, Earl! I was wondering, what was the reason behind the `destroy-schema-hook' modifications? The two locally blocks are identical, so that doesn't look right, but I figure, was something not working properly to prompt such change?

https://github.com/earl-ducaine/cl-garnet/blob/f0095848513ba69c370ed1dc51ee01f0bb4dd108/multi-garnet/multi-garnet.lisp#L659