Use simpler Plugin::initialize() when feasible

Change-Id: I567965d266f20526bda9f823e31a04b354d53fb1
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/ctfvisualizer/ctfvisualizerplugin.cpp

@@ -1,5 +1,6 @@
 // Copyright (C) 2019 Klarälvdalens Datakonsult AB, a KDAB Group company,
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
 #include "ctfvisualizerplugin.h"
 
 #include "ctfvisualizertool.h"
@@ -18,13 +19,9 @@ CtfVisualizerPlugin::~CtfVisualizerPlugin()
     delete d;
 }
 
-bool CtfVisualizerPlugin::initialize(const QStringList &arguments, QString *errorString)
+void CtfVisualizerPlugin::initialize()
 {
-    Q_UNUSED(arguments)
-    Q_UNUSED(errorString)
-
     d = new CtfVisualizerPluginPrivate;
-    return true;
 }
 
 } // namespace Internal

src/plugins/ctfvisualizer/ctfvisualizerplugin.h

@@ -16,7 +16,7 @@ class CtfVisualizerPlugin : public ExtensionSystem::IPlugin
 public:
     ~CtfVisualizerPlugin();
 
-    bool initialize(const QStringList &arguments, QString *errorString) final;
+    void initialize() final;
 
     class CtfVisualizerPluginPrivate *d = nullptr;
 };