QMakeProjectManager: Clean forward declaration

Change-Id: If2a70a5b39b999119cb02c84b72a5a13891661dc
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/qmakeprojectmanager/addlibrarywizard.h

@@ -30,7 +30,6 @@
 
 QT_BEGIN_NAMESPACE
 class QRadioButton;
-class QCheckBox;
 class QLabel;
 QT_END_NAMESPACE
 

src/plugins/qmakeprojectmanager/customwidgetwizard/plugingenerator.h

@@ -31,7 +31,6 @@
 #include <QMap>
 
 QT_BEGIN_NAMESPACE
-class QWidget;
 QT_END_NAMESPACE
 
 namespace Core { class GeneratedFile; }

src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.h

@@ -42,7 +42,6 @@ QT_END_NAMESPACE
 namespace QmakeProjectManager {
 
 class QmakeProFile;
-class QmakeProFileNode;
 class QmakeProject;
 
 namespace Internal {

src/plugins/qmakeprojectmanager/externaleditors.h

@@ -33,7 +33,6 @@
 #include <QMap>
 
 QT_BEGIN_NAMESPACE
-class QProcess;
 class QTcpSocket;
 QT_END_NAMESPACE
 

src/plugins/qmakeprojectmanager/makefileparse.h

@@ -29,10 +29,6 @@
 #include <qtsupport/baseqtversion.h>
 #include <qmakeprojectmanager/qmakestep.h>
 
-QT_BEGIN_NAMESPACE
-class QLogggingCategory;
-QT_END_NAMESPACE
-
 namespace QmakeProjectManager {
 namespace Internal {
 

src/plugins/qmakeprojectmanager/makestep.h

@@ -32,7 +32,6 @@
 namespace ProjectExplorer {
 class BuildStep;
 class IBuildStepFactory;
-class Task;
 }
 
 namespace QmakeProjectManager {

src/plugins/qmakeprojectmanager/profilehoverhandler.h

@@ -29,7 +29,6 @@
 #include <texteditor/codeassist/keywordscompletionassist.h>
 
 QT_BEGIN_NAMESPACE
-class QUrl;
 QT_END_NAMESPACE
 
 namespace QmakeProjectManager {

src/plugins/qmakeprojectmanager/qmakeprojectconfigwidget.h

@@ -35,7 +35,6 @@ namespace Utils { class DetailsWidget; }
 
 namespace QmakeProjectManager {
 class QmakeBuildConfiguration;
-class QmakeProFileNode;
 
 namespace Internal {
 namespace Ui { class QmakeProjectConfigWidget; }

src/plugins/qmakeprojectmanager/qmakestep.h

@@ -38,7 +38,6 @@ class Abi;
 class BuildStep;
 class IBuildStepFactory;
 class Project;
-class Kit;
 } // namespace ProjectExplorer
 
 namespace QtSupport { class BaseQtVersion; }