Mercurial: Remove stale member variable

Change-Id: I1bbcf0237be333a4073d804ad39c899294dd05b9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/mercurial/clonewizard.h

@@ -33,8 +33,6 @@
 #include <vcsbase/basecheckoutwizardfactory.h>
 #include <vcsbase/basecheckoutwizard.h>
 
-#include <QIcon>
-
 namespace Mercurial {
 namespace Internal {
 
@@ -46,9 +44,6 @@ public:
     CloneWizardFactory();
 
     VcsBase::BaseCheckoutWizard *create(const Utils::FileName &path, QWidget *parent = 0) const;
-
-private:
-    const QIcon m_icon;
 };
 
 class CloneWizard : public VcsBase::BaseCheckoutWizard