[REM] undead modules reanimated by translation file exports
[REM] leftovers from removed/deactivated modules

* document_page should have disappeared a long time ago, no idea why it
  remains
* thunderbird seems to have suffered from odd conflictual moves (or lack
  thereof)
* audittrail was removed but not deactivated in rosetta
Merge pull request #174 from odoo-dev/tnx-remains

Various ex-module remains