Remove checking for a null sessionmanager.

That can't happen.

Change-Id: I05293e96e7a716fbaf5fd03aa182c723c9858a03
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/classview/classviewparser.cpp

@@ -679,7 +679,6 @@ QList<ProjectExplorer::Project *> Parser::getProjectList() const
     // check all projects
     ProjectExplorer::SessionManager *sessionManager
             = ProjectExplorer::ProjectExplorerPlugin::instance()->session();
-    QTC_ASSERT(sessionManager, return list);
 
     list = sessionManager->projects();