ProjectExplorer: Move ITargetFactory to object pool

Makes multiple target factories per project possible

Reviewed-By: hunger

src/plugins/qt4projectmanager/qt4project.cpp

@@ -249,7 +249,6 @@ Qt4Project::Qt4Project(Qt4Manager *manager, const QString& fileName) :
     m_manager(manager),
     m_rootProjectNode(0),
     m_nodesWatcher(new Internal::Qt4NodesWatcher(this)),
-    m_targetFactory(new Qt4TargetFactory(this)),
     m_fileInfo(new Qt4ProjectFile(this, fileName, this)),
     m_projectFiles(new Qt4ProjectFiles),
     m_proFileOption(0),
@@ -355,11 +354,6 @@ bool Qt4Project::fromMap(const QVariantMap &map)
     return true;
 }
 
-Qt4TargetFactory *Qt4Project::targetFactory() const
-{
-    return m_targetFactory;
-}
-
 Qt4Target *Qt4Project::activeTarget() const
 {
     return static_cast<Qt4Target *>(Project::activeTarget());