ProjectExlorer: Streamline creation of NamedWidgets

Change-Id: I67c1506ea4e2d7722c9ce38738e350418d725a0e
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/cmakeprojectmanager/cmakeproject.h

@@ -35,25 +35,10 @@
 #include <projectexplorer/buildsystem.h>
 #include <projectexplorer/project.h>
 
-#include <utils/fileutils.h>
-
-#include <QFuture>
-#include <QHash>
-#include <QTimer>
-
 #include <memory>
 
-namespace CppTools { class CppProjectUpdater; }
-namespace ProjectExplorer { class FileNode; }
-
 namespace CMakeProjectManager {
 
-namespace Internal {
-class CMakeBuildConfiguration;
-class CMakeBuildSettingsWidget;
-class CMakeProjectNode;
-} // namespace Internal
-
 class CMAKE_EXPORT CMakeProject : public ProjectExplorer::Project
 {
     Q_OBJECT