Removing some unused semicolons after Q_UNUSED

There were both variants, with and without extra semicolon.

src/plugins/help/centralwidget.cpp

@@ -354,7 +354,7 @@ void CentralWidget::printPreview(QPrinter *p)
     if (viewer)
         viewer->print(p);
 #else
-    Q_UNUSED(p);
+    Q_UNUSED(p)
 #endif
 }
 
@@ -513,7 +513,7 @@ void CentralWidget::setTabTitle(const QUrl& url)
         }
     }
 #else
-    Q_UNUSED(url);
+    Q_UNUSED(url)
 #endif
 
     if (viewer) {
@@ -643,7 +643,7 @@ bool CentralWidget::find(const QString &txt, QTextDocument::FindFlags findFlags,
     HelpViewer* viewer = currentHelpViewer();
 
 #if !defined(QT_NO_WEBKIT)
-    Q_UNUSED(incremental);
+    Q_UNUSED(incremental)
     if (viewer) {
         QWebPage::FindFlags options = QWebPage::FindWrapsAroundDocument;
         if (findFlags & QTextDocument::FindBackward)

src/plugins/help/helpfindsupport.cpp

@@ -123,7 +123,7 @@ bool HelpViewerFindSupport::find(const QString &txt, Find::IFindSupport::FindFla
 {
     QTC_ASSERT(m_viewer, return false);
 #if !defined(QT_NO_WEBKIT)
-    Q_UNUSED(incremental);
+    Q_UNUSED(incremental)
     QWebPage::FindFlags options = QWebPage::FindWrapsAroundDocument;
     if (findFlags & Find::IFindSupport::FindBackward)
         options |= QWebPage::FindBackward;

src/plugins/help/helpindexfilter.cpp

@@ -106,6 +106,6 @@ void HelpIndexFilter::accept(FilterEntry selection) const
 
 void HelpIndexFilter::refresh(QFutureInterface<void> &future)
 {
-    Q_UNUSED(future);
+    Q_UNUSED(future)
     // Nothing to refresh
 }

src/plugins/help/helpplugin.cpp

@@ -135,8 +135,8 @@ HelpPlugin::~HelpPlugin()
 
 bool HelpPlugin::initialize(const QStringList &arguments, QString *error)
 {
-    Q_UNUSED(arguments);
-    Q_UNUSED(error);
+    Q_UNUSED(arguments)
+    Q_UNUSED(error)
     m_core = Core::ICore::instance();
     QList<int> globalcontext;
     globalcontext << Core::Constants::C_GLOBAL_ID;