[FIX] project_scrum: translation string duplicate error

bzr revid: mra@mra-laptop-20100720040132-u4n96kd3b6ndz0kg

addons/project_scrum/i18n/project_scrum.pot

@@ -589,11 +589,6 @@ msgstr ""
 msgid "Draft Backlogs"
 msgstr ""
 
-#. module: project_scrum
-#: field:project.scrum.sprint,backlog_ids:0
-msgid "Sprint Backlog"
-msgstr ""
-
 #. module: project_scrum
 #: model:ir.actions.act_window,name:project_scrum.action_view_task6
 #: model:ir.ui.menu,name:project_scrum.menu_action_view_task6