[entities, view] delete dead code
The auto_unwrap_bw_compat metaclass calls unwrap_adapter_compat, which
was removed in changeset 697a8181ba30 "remove 3.9 bw compat". So this
can't possibly work anymore, meaning we can get rid of it.
rql('SET X name "BoundaryConstraint" ''WHERE X is CWConstraintType, X name "BoundConstraint"')