src: remove KeyObjectData::CreateSecret overload
requested to merge github/fork/tniessen/src-remove-keyobjectdata-createsecret-arraybufferorviewcontents into master
This function is unused and there is not much potential for using it in the current codebase.
This is the only invocation of CreateSecret
that could use this overload instead of calling ToCopy
, and it seems appropriate to explicitly call ToCopy
here.