Clean headers in ClearCase plugin.

Change-Id: I81d3f7f459afb00ba6028513a19c0727b03ef005
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/clearcase/clearcasesettings.h

@@ -34,7 +34,7 @@
 #define CLEARCASESETTINGS_H
 
 #include <QHash>
-#include <QStringList>
+#include <QString>
 
 QT_BEGIN_NAMESPACE
 class QSettings;

src/plugins/clearcase/clearcasesubmiteditor.h

@@ -33,11 +33,10 @@
 #ifndef CLEARCASESUBMITEDITOR_H
 #define CLEARCASESUBMITEDITOR_H
 
-#include <QPair>
-#include <QStringList>
-
 #include <vcsbase/vcsbasesubmiteditor.h>
 
+QT_FORWARD_DECLARE_CLASS(QStringList)
+
 namespace ClearCase {
 namespace Internal {
 

src/plugins/clearcase/settingspage.h

@@ -33,17 +33,9 @@
 #ifndef SETTINGSPAGE_H
 #define SETTINGSPAGE_H
 
-#include "ui_settingspage.h"
-
 #include <vcsbase/vcsbaseoptionspage.h>
 
-#include <QPointer>
-#include <QString>
-#include <QWidget>
-
-QT_BEGIN_NAMESPACE
-class QSettings;
-QT_END_NAMESPACE
+#include "ui_settingspage.h"
 
 namespace ClearCase {
 namespace Internal {

src/plugins/clearcase/versionselector.h

@@ -34,8 +34,6 @@
 #define VERSIONSELECTOR_H
 
 #include <QDialog>
-#include <QDateTime>
-#include <QString>
 
 QT_BEGIN_NAMESPACE
 class QTextStream;