[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.
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html