Re: [PATCH] Don't validate properties during deletion.

Perhaps the better change is to make svn_repos__validate_prop() early-out
(with success, of course) on a NULL value and adjust the rest of the code
therein accordingly. I can see the benefit in flagging the *addition* (or
modification) of a non-regular property (which is the first test that
function performs), but there's need to block the ability to cleanup after
such an errant change has already occurred. And we don't have any
properties which are required to be present. So, again, I say there's no
need to validate any type of property deletion.

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