Part of request #7314 - Remove dead code

Change-Id: I52ed46eec224746a66447bce21a32970a77ddb93
Merge commit 'refs/changes/35/2635/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Part of request #7314 - Remove dead code

Conflicts:
	src/db/mysql/database_structure.sql
This is Tuleap 7.3.99.66

Change-Id: Ib889450ecf1d97f7f642705d6f72dd35508aaef7