Fixes: coreplugin: remove a few more PluginManager* parameters

src/plugins/coreplugin/mainwindow.cpp

@@ -1114,7 +1114,7 @@ void MainWindow::destroyVersionDialog()
 
 void MainWindow::aboutPlugins()
 {
-    PluginDialog dialog(ExtensionSystem::PluginManager::instance(), this);
+    PluginDialog dialog(this);
     dialog.exec();
 }
 

src/plugins/coreplugin/outputpane.h

@@ -132,8 +132,6 @@ private:
     QWidget *m_buttonsWidget;
     QMap<int, QPushButton *> m_buttons;
     QMap<QAction *, int> m_actions;
-
-    static OutputPaneManager *m_instance;
 };
 
 } // namespace Internal

src/plugins/coreplugin/plugindialog.cpp

@@ -48,9 +48,9 @@
 
 using namespace Core::Internal;
 
-PluginDialog::PluginDialog(ExtensionSystem::PluginManager *manager, QWidget *parent)
+PluginDialog::PluginDialog(QWidget *parent)
     : QDialog(parent),
-      m_view(new ExtensionSystem::PluginView(manager, this))
+      m_view(new ExtensionSystem::PluginView(ExtensionSystem::PluginManager::instance(), this))
 {
     QVBoxLayout *vl = new QVBoxLayout(this);
     vl->addWidget(m_view);

src/plugins/coreplugin/plugindialog.h

@@ -41,7 +41,6 @@ class QPushButton;
 QT_END_NAMESPACE
 
 namespace ExtensionSystem {
-class PluginManager;
 class PluginSpec;
 class PluginView;
 }
@@ -54,7 +53,7 @@ class PluginDialog : public QDialog
     Q_OBJECT
 
 public:
-    PluginDialog(ExtensionSystem::PluginManager *manager, QWidget *parent);
+    explicit PluginDialog(QWidget *parent);
 
 private slots:
     void updateButtons();